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      <author>Alvaro Diaz Falconi</author>
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          <p style="font-weight: bold; color: #800000; font-size: 12px;">Elementary triangle geometry</p>
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          <content>
            <p>g</p>
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          <input>
            <e type="operand">z#</e>
            <e type="function" args="1">RE</e>
            <e type="operand">z#</e>
            <e type="operand">z#</e>
            <e type="function" args="1">Conjugate</e>
            <e type="operator" args="2">+</e>
            <e type="operand">2</e>
            <e type="operator" args="2">/</e>
            <e type="operand">1</e>
            <e type="operand">1</e>
            <e type="function" args="3">line</e>
            <e type="operator" args="2">:</e>
          </input>
        </math>
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      <region left="207" top="99" width="140" height="47" color="#000000" fontSize="10">
        <math>
          <input>
            <e type="operand">z#</e>
            <e type="function" args="1">IM</e>
            <e type="operand">z#</e>
            <e type="operand">z#</e>
            <e type="function" args="1">Conjugate</e>
            <e type="operator" args="2">-</e>
            <e type="operand">2</e>
            <e type="operand">i</e>
            <e type="operator" args="2">*</e>
            <e type="operator" args="2">/</e>
            <e type="operand">1</e>
            <e type="operand">1</e>
            <e type="function" args="3">line</e>
            <e type="operator" args="2">:</e>
          </input>
        </math>
      </region>
      <region left="432" top="99" width="122" height="26" color="#000000" fontSize="10">
        <math>
          <input>
            <e type="operand">a</e>
            <e type="operand">b</e>
            <e type="operand">i</e>
            <e type="operator" args="2">*</e>
            <e type="operator" args="2">+</e>
            <e type="function" args="1">RE</e>
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          <result action="symbolic">
            <e type="operand">a</e>
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      <region left="432" top="126" width="195" height="26" color="#000000" fontSize="10">
        <math>
          <input>
            <e type="operand">a</e>
            <e type="operand">b</e>
            <e type="operand">i</e>
            <e type="operator" args="2">*</e>
            <e type="operator" args="2">+</e>
            <e type="function" args="1">Re</e>
          </input>
          <result action="symbolic">
            <e type="operand">a</e>
            <e type="operand">b</e>
            <e type="operand">i</e>
            <e type="operator" args="2">*</e>
            <e type="operator" args="2">+</e>
            <e type="function" args="1">Re</e>
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          <input>
            <e type="operand">M#</e>
            <e type="function" args="1">z2xy</e>
            <e type="operand">A#</e>
            <e type="operand">0</e>
            <e type="operator" args="2">:</e>
            <e type="operand">r#</e>
            <e type="operand">0</e>
            <e type="operator" args="2">:</e>
            <e type="operand">1</e>
            <e type="operand">2</e>
            <e type="function" args="4">mat</e>
            <e type="operand">a#</e>
            <e type="operand">M#</e>
            <e type="function" args="1">sys2mat.1</e>
            <e type="operand">r#</e>
            <e type="operand">r#</e>
            <e type="operand">1</e>
            <e type="operator" args="2">+</e>
            <e type="operator" args="2">:</e>
            <e type="operand">A#</e>
            <e type="operand">r#</e>
            <e type="operand">1</e>
            <e type="function" args="3">el</e>
            <e type="operand">a#</e>
            <e type="function" args="1">RE</e>
            <e type="operator" args="2">:</e>
            <e type="operand">A#</e>
            <e type="operand">r#</e>
            <e type="operand">2</e>
            <e type="function" args="3">el</e>
            <e type="operand">a#</e>
            <e type="function" args="1">IM</e>
            <e type="operator" args="2">:</e>
            <e type="operand">1</e>
            <e type="operand">3</e>
            <e type="function" args="5">mat</e>
            <e type="function" args="3">for</e>
            <e type="operand">A#</e>
            <e type="operand">3</e>
            <e type="operand">1</e>
            <e type="function" args="5">line</e>
            <e type="operator" args="2">:</e>
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            <e type="operand">A#</e>
            <e type="operand">1</e>
            <e type="function" args="2">el</e>
            <e type="operand">i</e>
            <e type="operand">A#</e>
            <e type="operand">2</e>
            <e type="function" args="2">el</e>
            <e type="operator" args="2">*</e>
            <e type="operator" args="2">+</e>
            <e type="operand">1</e>
            <e type="operand">1</e>
            <e type="function" args="3">line</e>
            <e type="operator" args="2">:</e>
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              <p>Line</p>
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            <e type="operand">B#</e>
            <e type="function" args="2">gL</e>
            <e type="operand">R#</e>
            <e type="operand">A#</e>
            <e type="function" args="1">IM</e>
            <e type="operand">B#</e>
            <e type="function" args="1">IM</e>
            <e type="operator" args="2">-</e>
            <e type="bracket">(</e>
            <e type="operand">z</e>
            <e type="function" args="1">RE</e>
            <e type="operator" args="2">*</e>
            <e type="operand">A#</e>
            <e type="function" args="1">RE</e>
            <e type="operand">B#</e>
            <e type="function" args="1">RE</e>
            <e type="operator" args="2">-</e>
            <e type="bracket">(</e>
            <e type="operand">z</e>
            <e type="function" args="1">IM</e>
            <e type="operator" args="2">*</e>
            <e type="operator" args="2">-</e>
            <e type="operand">A#</e>
            <e type="function" args="1">RE</e>
            <e type="operand">B#</e>
            <e type="function" args="1">IM</e>
            <e type="operator" args="2">*</e>
            <e type="operand">A#</e>
            <e type="function" args="1">IM</e>
            <e type="operand">B#</e>
            <e type="function" args="1">RE</e>
            <e type="operator" args="2">*</e>
            <e type="operator" args="2">-</e>
            <e type="bracket">(</e>
            <e type="operator" args="2">+</e>
            <e type="function" args="1">numden</e>
            <e type="operator" args="2">:</e>
            <e type="operand">R#</e>
            <e type="operand">1</e>
            <e type="function" args="2">el</e>
            <e type="operand">R#</e>
            <e type="operand">2</e>
            <e type="function" args="2">el</e>
            <e type="operator" args="2">*</e>
            <e type="operand">2</e>
            <e type="operand">1</e>
            <e type="function" args="4">line</e>
            <e type="operator" args="2">:</e>
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      <region left="54" top="423" width="291" height="52" color="#000000" fontSize="10">
        <math>
          <description active="true" position="Top" lang="eng" width="15">
            <content>
              <p>Intersection</p>
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          </description>
          <input>
            <e type="operand">a#</e>
            <e type="operand">b#</e>
            <e type="function" args="2">g∩</e>
            <e type="operand">a#</e>
            <e type="operand">b#</e>
            <e type="operand">2</e>
            <e type="operand">1</e>
            <e type="function" args="4">mat</e>
            <e type="operand">x</e>
            <e type="operand">y</e>
            <e type="operand">2</e>
            <e type="operand">1</e>
            <e type="function" args="4">mat</e>
            <e type="function" args="2">roots</e>
            <e type="function" args="1">xy2z</e>
            <e type="operand">1</e>
            <e type="operand">1</e>
            <e type="function" args="3">line</e>
            <e type="operator" args="2">:</e>
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        <math>
          <description active="true" position="Top" lang="eng" width="15">
            <content>
              <p>At</p>
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          </description>
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            <e type="operand">x#</e>
            <e type="operand">A#</e>
            <e type="function" args="2">g\0040\</e>
            <e type="operand">x#</e>
            <e type="operand">x</e>
            <e type="operand">A#</e>
            <e type="function" args="1">RE</e>
            <e type="operator" args="2">≡</e>
            <e type="operand">y</e>
            <e type="operand">A#</e>
            <e type="function" args="1">IM</e>
            <e type="operator" args="2">≡</e>
            <e type="operand">2</e>
            <e type="operand">1</e>
            <e type="function" args="4">sys</e>
            <e type="function" args="2">at</e>
            <e type="operand">1</e>
            <e type="operand">1</e>
            <e type="function" args="3">line</e>
            <e type="operator" args="2">:</e>
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        </math>
      </region>
      <region left="54" top="522" width="230" height="29" color="#000000" fontSize="10">
        <math>
          <description active="true" position="Top" lang="eng">
            <content>
              <p>Paralel at A to a</p>
            </content>
          </description>
          <input>
            <e type="operand">a#</e>
            <e type="operand">A#</e>
            <e type="function" args="2">g\007C\</e>
            <e type="operand">a#</e>
            <e type="operand">a#</e>
            <e type="operand">A#</e>
            <e type="function" args="2">g\0040\</e>
            <e type="operator" args="2">-</e>
            <e type="operand">1</e>
            <e type="operand">1</e>
            <e type="function" args="3">line</e>
            <e type="operator" args="2">:</e>
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        </math>
      </region>
      <region left="333" top="522" width="272" height="31" color="#000000" fontSize="10">
        <math>
          <description active="true" position="Top" lang="eng">
            <content>
              <p>Parpendicular at A to a</p>
            </content>
          </description>
          <input>
            <e type="operand">a#</e>
            <e type="operand">A#</e>
            <e type="function" args="2">g⟂</e>
            <e type="operand">a#</e>
            <e type="operand">i</e>
            <e type="operand">z</e>
            <e type="operator" args="2">*</e>
            <e type="function" args="2">g\0040\</e>
            <e type="operand">A#</e>
            <e type="function" args="2">g\007C\</e>
            <e type="operand">1</e>
            <e type="operand">1</e>
            <e type="function" args="3">line</e>
            <e type="operator" args="2">:</e>
          </input>
        </math>
      </region>
      <region left="693" top="540" width="26" height="24" color="#000000" fontSize="10">
        <math>
          <input>
            <e type="operand">∥</e>
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        </math>
      </region>
      <region left="54" top="585" width="287" height="80" color="#000000" fontSize="10">
        <math>
          <description active="true" position="Top" lang="eng">
            <content>
              <p>Signed distance</p>
            </content>
          </description>
          <input>
            <e type="operand">r#</e>
            <e type="operand">A#</e>
            <e type="function" args="2">gδ</e>
            <e type="operand">r#</e>
            <e type="operand">A#</e>
            <e type="function" args="2">g\0040\</e>
            <e type="operand">r#</e>
            <e type="operand">x</e>
            <e type="function" args="2">diff</e>
            <e type="bracket">(</e>
            <e type="operand">2</e>
            <e type="operator" args="2">^</e>
            <e type="operand">r#</e>
            <e type="operand">y</e>
            <e type="function" args="2">diff</e>
            <e type="bracket">(</e>
            <e type="operand">2</e>
            <e type="operator" args="2">^</e>
            <e type="operator" args="2">+</e>
            <e type="function" args="1">sqrt</e>
            <e type="operator" args="2">/</e>
            <e type="operand">1</e>
            <e type="operand">1</e>
            <e type="function" args="3">line</e>
            <e type="operator" args="2">:</e>
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        </math>
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        <math>
          <description active="true" position="Top" lang="eng">
            <content>
              <p>Signed bisector</p>
            </content>
          </description>
          <input>
            <e type="operand">r#</e>
            <e type="operand">s#</e>
            <e type="function" args="2">gβ</e>
            <e type="operand">s#</e>
            <e type="operand">x</e>
            <e type="function" args="2">diff</e>
            <e type="operand">2</e>
            <e type="operator" args="2">^</e>
            <e type="operand">s#</e>
            <e type="operand">y</e>
            <e type="function" args="2">diff</e>
            <e type="operand">2</e>
            <e type="operator" args="2">^</e>
            <e type="operator" args="2">+</e>
            <e type="function" args="1">sqrt</e>
            <e type="operand">r#</e>
            <e type="operator" args="2">*</e>
            <e type="operand">r#</e>
            <e type="operand">x</e>
            <e type="function" args="2">diff</e>
            <e type="operand">2</e>
            <e type="operator" args="2">^</e>
            <e type="operand">r#</e>
            <e type="operand">y</e>
            <e type="function" args="2">diff</e>
            <e type="operand">2</e>
            <e type="operator" args="2">^</e>
            <e type="operator" args="2">+</e>
            <e type="function" args="1">sqrt</e>
            <e type="operand">s#</e>
            <e type="operator" args="2">*</e>
            <e type="operator" args="2">+</e>
            <e type="operand">1</e>
            <e type="operand">1</e>
            <e type="function" args="3">line</e>
            <e type="operator" args="2">:</e>
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        <math>
          <description active="true" position="Top" lang="eng">
            <content>
              <p>Circle center and radious from 3 points</p>
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          <input>
            <e type="operand">A#</e>
            <e type="operand">B#</e>
            <e type="operand">C#</e>
            <e type="function" args="3">gC</e>
            <e type="operand">eq#</e>
            <e type="operand">x</e>
            <e type="operand">a#</e>
            <e type="operator" args="2">-</e>
            <e type="bracket">(</e>
            <e type="operand">2</e>
            <e type="operator" args="2">^</e>
            <e type="operand">y</e>
            <e type="operand">b#</e>
            <e type="operator" args="2">-</e>
            <e type="bracket">(</e>
            <e type="operand">2</e>
            <e type="operator" args="2">^</e>
            <e type="operator" args="2">+</e>
            <e type="operand">r#</e>
            <e type="operand">2</e>
            <e type="operator" args="2">^</e>
            <e type="operator" args="2">-</e>
            <e type="operator" args="2">:</e>
            <e type="operand">a#</e>
            <e type="operand">b#</e>
            <e type="operand">r#</e>
            <e type="operand">3</e>
            <e type="operand">1</e>
            <e type="function" args="5">mat</e>
            <e type="operand">0</e>
            <e type="operand">0</e>
            <e type="operand">0</e>
            <e type="operand">3</e>
            <e type="operand">1</e>
            <e type="function" args="5">mat</e>
            <e type="operand">u#</e>
            <e type="function" args="1">f#</e>
            <e type="operand">a#</e>
            <e type="operand">b#</e>
            <e type="operand">r#</e>
            <e type="operand">1</e>
            <e type="operand">3</e>
            <e type="function" args="5">mat</e>
            <e type="operand">u#</e>
            <e type="operand">1</e>
            <e type="function" args="2">el</e>
            <e type="operand">u#</e>
            <e type="operand">2</e>
            <e type="function" args="2">el</e>
            <e type="operand">u#</e>
            <e type="operand">3</e>
            <e type="function" args="2">el</e>
            <e type="operand">1</e>
            <e type="operand">3</e>
            <e type="function" args="5">mat</e>
            <e type="operator" args="2">:</e>
            <e type="operand">eq#</e>
            <e type="operand">A#</e>
            <e type="function" args="2">g\0040\</e>
            <e type="operand">eq#</e>
            <e type="operand">B#</e>
            <e type="function" args="2">g\0040\</e>
            <e type="operand">eq#</e>
            <e type="operand">C#</e>
            <e type="function" args="2">g\0040\</e>
            <e type="operand">3</e>
            <e type="operand">1</e>
            <e type="function" args="5">mat</e>
            <e type="operand">2</e>
            <e type="operand">1</e>
            <e type="function" args="4">line</e>
            <e type="operator" args="2">:</e>
            <e type="function" args="2">al_nleqsolve</e>
            <e type="operator" args="2">:</e>
            <e type="operand">a#</e>
            <e type="operand">i</e>
            <e type="operand">b#</e>
            <e type="operator" args="2">*</e>
            <e type="operator" args="2">+</e>
            <e type="operand">r#</e>
            <e type="operand">1</e>
            <e type="operand">2</e>
            <e type="function" args="4">mat</e>
            <e type="operand">3</e>
            <e type="operand">1</e>
            <e type="function" args="5">line</e>
            <e type="operator" args="2">:</e>
          </input>
        </math>
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      <region left="54" top="990" width="590" height="278" color="#000000" fontSize="10">
        <math breaking="81">
          <description active="true" position="Top" lang="eng">
            <content>
              <p>XYPlot shorthands</p>
            </content>
          </description>
          <input>
            <e type="operand">S#</e>
            <e type="operand">A#</e>
            <e type="operand">B#</e>
            <e type="function" args="3">gXY</e>
            <e type="operand">S#</e>
            <e type="operand" style="string">Circle</e>
            <e type="operator" args="2">≡</e>
            <e type="operand" style="string">circle</e>
            <e type="operand">A#</e>
            <e type="function" args="1">Re</e>
            <e type="operand">A#</e>
            <e type="function" args="1">Im</e>
            <e type="operand">B#</e>
            <e type="operand">1</e>
            <e type="operand">3</e>
            <e type="function" args="5">mat</e>
            <e type="function" args="1">transpose</e>
            <e type="operand">1</e>
            <e type="operand">1</e>
            <e type="function" args="3">mat</e>
            <e type="operand" style="string">blue</e>
            <e type="operand" style="string">solid</e>
            <e type="operand">1</e>
            <e type="operand" style="string">none</e>
            <e type="function" args="6">stack</e>
            <e type="operand">1</e>
            <e type="operand">1</e>
            <e type="function" args="3">mat</e>
            <e type="operand">1</e>
            <e type="operand">1</e>
            <e type="function" args="3">mat</e>
            <e type="operand">S#</e>
            <e type="operand" style="string">Point</e>
            <e type="operator" args="2">≡</e>
            <e type="operand">B#</e>
            <e type="operand" style="string">.</e>
            <e type="operator" args="2">≡</e>
            <e type="operand">A#</e>
            <e type="function" args="1">str2num</e>
            <e type="function" args="1">z2xy</e>
            <e type="operand" style="string">.</e>
            <e type="operand">6</e>
            <e type="operand" style="string">blue</e>
            <e type="function" args="4">augment</e>
            <e type="function" args="1">eval</e>
            <e type="operand">A#</e>
            <e type="function" args="1">str2num</e>
            <e type="function" args="1">z2xy</e>
            <e type="operand">A#</e>
            <e type="operand">8</e>
            <e type="operand" style="string">blue</e>
            <e type="function" args="4">augment</e>
            <e type="function" args="1">eval</e>
            <e type="operand">2</e>
            <e type="operand">1</e>
            <e type="function" args="4">sys</e>
            <e type="operand">A#</e>
            <e type="function" args="1">str2num</e>
            <e type="function" args="1">z2xy</e>
            <e type="operand" style="string">.</e>
            <e type="operand">6</e>
            <e type="operand" style="string">blue</e>
            <e type="function" args="4">augment</e>
            <e type="function" args="1">eval</e>
            <e type="operand">A#</e>
            <e type="function" args="1">str2num</e>
            <e type="function" args="1">z2xy</e>
            <e type="operand">A#</e>
            <e type="operand">8</e>
            <e type="operand" style="string">blue</e>
            <e type="function" args="4">augment</e>
            <e type="function" args="1">eval</e>
            <e type="operand">2</e>
            <e type="operand">1</e>
            <e type="function" args="4">sys</e>
            <e type="function" args="3">if</e>
            <e type="operand" style="string">Nothing else</e>
            <e type="function" args="5">if</e>
            <e type="operand">1</e>
            <e type="operand">1</e>
            <e type="function" args="3">line</e>
            <e type="operator" args="2">:</e>
          </input>
        </math>
      </region>
      <region top="1305" color="#000000">
        <area terminator="true" />
      </region>
    </region>
    <region left="54" top="1332" width="91" height="24" color="#000000" fontSize="10">
      <math>
        <input>
          <e type="operand">z</e>
          <e type="operand">x</e>
          <e type="operand">i</e>
          <e type="operand">y</e>
          <e type="operator" args="2">*</e>
          <e type="operator" args="2">+</e>
          <e type="operator" args="2">:</e>
        </input>
      </math>
    </region>
    <region left="54" top="1359" width="180" height="63" color="#000000" bgColor="#ffff80" fontSize="10">
      <math>
        <input>
          <e type="operand">Points</e>
          <e type="operand">A</e>
          <e type="operand">2</e>
          <e type="operand">2.5</e>
          <e type="operand">i</e>
          <e type="operator" args="2">*</e>
          <e type="operator" args="2">+</e>
          <e type="operator" args="2">:</e>
          <e type="operand">B</e>
          <e type="operand">7</e>
          <e type="operand">3</e>
          <e type="operand">i</e>
          <e type="operator" args="2">*</e>
          <e type="operator" args="2">+</e>
          <e type="operator" args="2">:</e>
          <e type="operand">C</e>
          <e type="operand">5</e>
          <e type="operand">6</e>
          <e type="operand">i</e>
          <e type="operator" args="2">*</e>
          <e type="operator" args="2">+</e>
          <e type="operator" args="2">:</e>
          <e type="operand">3</e>
          <e type="operand">1</e>
          <e type="function" args="5">sys</e>
          <e type="operator" args="2">:</e>
        </input>
      </math>
    </region>
    <region left="270" top="1359" width="172" height="69" color="#000000" fontSize="10">
      <math>
        <input>
          <e type="operand">Sides</e>
          <e type="operand">a</e>
          <e type="operand">B</e>
          <e type="operand">C</e>
          <e type="function" args="2">gL</e>
          <e type="operator" args="2">:</e>
          <e type="operand">b</e>
          <e type="operand">A</e>
          <e type="operand">C</e>
          <e type="function" args="2">gL</e>
          <e type="operator" args="2">:</e>
          <e type="operand">c</e>
          <e type="operand">A</e>
          <e type="operand">B</e>
          <e type="function" args="2">gL</e>
          <e type="operator" args="2">:</e>
          <e type="operand">3</e>
          <e type="operand">1</e>
          <e type="function" args="5">sys</e>
          <e type="operator" args="2">:</e>
        </input>
      </math>
    </region>
    <region left="477" top="1359" width="176" height="84" color="#000000" fontSize="10">
      <math>
        <input>
          <e type="operand">MP</e>
          <e type="operand">M.AB</e>
          <e type="operand">0.5</e>
          <e type="operand">A</e>
          <e type="operand">B</e>
          <e type="operator" args="2">+</e>
          <e type="bracket">(</e>
          <e type="operator" args="2">*</e>
          <e type="operator" args="2">:</e>
          <e type="operand">M.BC</e>
          <e type="operand">0.5</e>
          <e type="operand">B</e>
          <e type="operand">C</e>
          <e type="operator" args="2">+</e>
          <e type="bracket">(</e>
          <e type="operator" args="2">*</e>
          <e type="operator" args="2">:</e>
          <e type="operand">M.AC</e>
          <e type="operand">0.5</e>
          <e type="operand">A</e>
          <e type="operand">C</e>
          <e type="operator" args="2">+</e>
          <e type="bracket">(</e>
          <e type="operator" args="2">*</e>
          <e type="operator" args="2">:</e>
          <e type="operand">3</e>
          <e type="operand">1</e>
          <e type="function" args="5">sys</e>
          <e type="operator" args="2">:</e>
        </input>
      </math>
    </region>
    <region left="54" top="1440" width="497" height="60" color="#000000" fontSize="8">
      <math>
        <input>
          <e type="operand">Tr</e>
          <e type="operand" style="string">polygon</e>
          <e type="operand">Points</e>
          <e type="function" args="1">z2xy</e>
          <e type="operand">1</e>
          <e type="operand">1</e>
          <e type="function" args="3">mat</e>
          <e type="operand" style="string">green</e>
          <e type="operand" style="string">solid</e>
          <e type="operand">1</e>
          <e type="operand" style="string">lightgreen</e>
          <e type="function" args="6">stack</e>
          <e type="operand">1</e>
          <e type="operand">1</e>
          <e type="function" args="3">mat</e>
          <e type="operand">1</e>
          <e type="operand">1</e>
          <e type="function" args="3">mat</e>
          <e type="operand">Points</e>
          <e type="function" args="1">z2xy</e>
          <e type="operand" style="string">A</e>
          <e type="operand" style="string">B</e>
          <e type="operand" style="string">C</e>
          <e type="operand">1</e>
          <e type="operand">3</e>
          <e type="function" args="5">mat</e>
          <e type="function" args="1">transpose</e>
          <e type="operand">8</e>
          <e type="operand" style="string">black</e>
          <e type="function" args="4">augment</e>
          <e type="function" args="1">eval</e>
          <e type="operand">2</e>
          <e type="operand">1</e>
          <e type="function" args="4">sys</e>
          <e type="operator" args="2">:</e>
        </input>
      </math>
    </region>
    <region top="1512" color="#000000">
      <area collapsed="false" />
      <region left="18" top="1539" width="174" height="118" color="#000000" fontSize="10">
        <math>
          <description active="true" position="Top" lang="eng">
            <content>
              <p>Centroid and medians</p>
            </content>
          </description>
          <input>
            <e type="operand">ml</e>
            <e type="operand">m.a</e>
            <e type="operand">M.AB</e>
            <e type="operand">C</e>
            <e type="function" args="2">gL</e>
            <e type="operator" args="2">:</e>
            <e type="operand">m.b</e>
            <e type="operand">M.BC</e>
            <e type="operand">A</e>
            <e type="function" args="2">gL</e>
            <e type="operator" args="2">:</e>
            <e type="operand">m.c</e>
            <e type="operand">M.AC</e>
            <e type="operand">B</e>
            <e type="function" args="2">gL</e>
            <e type="operator" args="2">:</e>
            <e type="operand">3</e>
            <e type="operand">1</e>
            <e type="function" args="5">sys</e>
            <e type="operator" args="2">:</e>
            <e type="operand">G</e>
            <e type="operand">m.a</e>
            <e type="operand">m.b</e>
            <e type="function" args="2">g∩</e>
            <e type="function" args="1">eval</e>
            <e type="operator" args="2">:</e>
            <e type="operand">2</e>
            <e type="operand">1</e>
            <e type="function" args="4">line</e>
          </input>
        </math>
      </region>
      <region left="351" top="1539" width="396" height="237" color="#000000" bgColor="#ffffff" fontSize="8" showInputData="false">
        <xyplot width="386" height="229" points="10" name="XYPlot">
          <chartstyle backcolor="White" bordercolor="Black" />
          <propertiessource index="1" sourcetype="PropertyGrid" />
          <grid gridcolor="LightGray" gridpattern="Dash" gridthickness="1" isxgrid="true" isygrid="true" isy2grid="false" />
          <xaxes xmin="-0.16701" xmax="9.148768" xtick="2" visible="False" decimalplaces="3" numberformat="General" />
          <yaxes ymin="1.237088" ymax="6.577915" ytick="2" visible="False" decimalplaces="3" numberformat="General" />
          <y2axes isy2axis="false" y2min="-1" y2max="1" y2tick="0.5" visible="True" decimalplaces="3" numberformat="General" />
          <title2d title="" titlefont="Arial, 10pt" titlefontcolor="Black" />
          <xylabel labelfont="Arial, 10pt" labelfontcolor="Black" tickfont="Arial, 8pt" tickfontcolor="Black" xlabel="" ylabel="" y2label="" />
          <legend isbordervisible="true" islegendvisible="false" legendbackcolor="White" legendbordercolor="Black" legendfont="Arial, 8pt" legendposition="NorthEast" textcolor="Black" />
          <traces>
            <trace seriesname="" isy2data="false" isvisible="true" plotmethod="Shapes" lineantialias="true" linecolor="Black" linethickness="1" linepattern="Solid" symbolantialias="true" symbolsize="8" symboltype="None" symbolborderthickness="1" symbolbordercolor="Black" symbolfillcolor="White" />
            <trace seriesname="" isy2data="false" isvisible="true" plotmethod="Labels" lineantialias="true" linecolor="Black" linethickness="1" linepattern="Solid" symbolantialias="true" symbolsize="8" symboltype="None" symbolborderthickness="1" symbolbordercolor="Black" symbolfillcolor="White" />
            <trace seriesname="" isy2data="false" isvisible="true" plotmethod="Lines" lineantialias="true" linecolor="Black" linethickness="1" linepattern="Solid" symbolantialias="true" symbolsize="8" symboltype="None" symbolborderthickness="1" symbolbordercolor="Black" symbolfillcolor="White" />
            <trace seriesname="" isy2data="false" isvisible="true" plotmethod="Lines" lineantialias="true" linecolor="Black" linethickness="1" linepattern="Solid" symbolantialias="true" symbolsize="8" symboltype="None" symbolborderthickness="1" symbolbordercolor="Black" symbolfillcolor="White" />
            <trace seriesname="" isy2data="false" isvisible="true" plotmethod="Lines" lineantialias="true" linecolor="Black" linethickness="1" linepattern="Solid" symbolantialias="true" symbolsize="8" symboltype="None" symbolborderthickness="1" symbolbordercolor="Black" symbolfillcolor="White" />
            <trace seriesname="" isy2data="false" isvisible="true" plotmethod="Lines" lineantialias="true" linecolor="Black" linethickness="1" linepattern="Solid" symbolantialias="true" symbolsize="8" symboltype="None" symbolborderthickness="1" symbolbordercolor="Black" symbolfillcolor="White" />
            <trace seriesname="" isy2data="false" isvisible="true" plotmethod="Lines" lineantialias="true" linecolor="Black" linethickness="1" linepattern="Solid" symbolantialias="true" symbolsize="8" symboltype="None" symbolborderthickness="1" symbolbordercolor="Black" symbolfillcolor="White" />
            <trace seriesname="" isy2data="false" isvisible="true" plotmethod="Lines" lineantialias="true" linecolor="Black" linethickness="1" linepattern="Solid" symbolantialias="true" symbolsize="8" symboltype="None" symbolborderthickness="1" symbolbordercolor="Black" symbolfillcolor="White" />
            <trace seriesname="" isy2data="false" isvisible="true" plotmethod="Labels" lineantialias="true" linecolor="Black" linethickness="1" linepattern="Solid" symbolantialias="true" symbolsize="8" symboltype="None" symbolborderthickness="1" symbolbordercolor="Black" symbolfillcolor="White" />
            <trace seriesname="" isy2data="false" isvisible="true" plotmethod="Labels" lineantialias="true" linecolor="Black" linethickness="1" linepattern="Solid" symbolantialias="true" symbolsize="8" symboltype="None" symbolborderthickness="1" symbolbordercolor="Black" symbolfillcolor="White" />
            <trace seriesname="" isy2data="false" isvisible="true" plotmethod="Labels" lineantialias="true" linecolor="Black" linethickness="1" linepattern="Solid" symbolantialias="true" symbolsize="8" symboltype="None" symbolborderthickness="1" symbolbordercolor="Black" symbolfillcolor="White" />
          </traces>
          <input>
            <e type="operand">P.1</e>
            <e type="operand">Tr</e>
            <e type="operand">ml</e>
            <e type="operand">Sides</e>
            <e type="operand">MP</e>
            <e type="function" args="1">z2xy</e>
            <e type="operand" style="string">o</e>
            <e type="operand">6</e>
            <e type="function" args="3">augment</e>
            <e type="function" args="1">eval</e>
            <e type="operand" style="string">Point</e>
            <e type="operand" style="string">G</e>
            <e type="operand" style="string">.</e>
            <e type="function" args="3">gXY</e>
            <e type="operand">5</e>
            <e type="operand">1</e>
            <e type="function" args="7">sys</e>
            <e type="operator" args="2">:</e>
          </input>
        </xyplot>
      </region>
      <region left="18" top="1773" width="215" height="202" color="#000000" fontSize="10">
        <math>
          <description active="true" position="Top" lang="eng">
            <content>
              <p>Orthocenter and altitudes</p>
            </content>
          </description>
          <input>
            <e type="operand">hl</e>
            <e type="operand">h.a</e>
            <e type="operand">a</e>
            <e type="operand">A</e>
            <e type="function" args="2">g⟂</e>
            <e type="operator" args="2">:</e>
            <e type="operand">h.b</e>
            <e type="operand">b</e>
            <e type="operand">B</e>
            <e type="function" args="2">g⟂</e>
            <e type="operator" args="2">:</e>
            <e type="operand">h.c</e>
            <e type="operand">c</e>
            <e type="operand">C</e>
            <e type="function" args="2">g⟂</e>
            <e type="operator" args="2">:</e>
            <e type="operand">3</e>
            <e type="operand">1</e>
            <e type="function" args="5">sys</e>
            <e type="operator" args="2">:</e>
            <e type="operand">H</e>
            <e type="operand">h.a</e>
            <e type="operand">h.b</e>
            <e type="function" args="2">g∩</e>
            <e type="function" args="1">eval</e>
            <e type="operator" args="2">:</e>
            <e type="operand">HP</e>
            <e type="operand">H.a</e>
            <e type="operand">a</e>
            <e type="operand">h.a</e>
            <e type="function" args="2">g∩</e>
            <e type="function" args="1">eval</e>
            <e type="operator" args="2">:</e>
            <e type="operand">H.b</e>
            <e type="operand">b</e>
            <e type="operand">h.b</e>
            <e type="function" args="2">g∩</e>
            <e type="function" args="1">eval</e>
            <e type="operator" args="2">:</e>
            <e type="operand">H.C</e>
            <e type="operand">c</e>
            <e type="operand">h.c</e>
            <e type="function" args="2">g∩</e>
            <e type="function" args="1">eval</e>
            <e type="operator" args="2">:</e>
            <e type="operand">3</e>
            <e type="operand">1</e>
            <e type="function" args="5">sys</e>
            <e type="operator" args="2">:</e>
            <e type="operand">3</e>
            <e type="operand">1</e>
            <e type="function" args="5">line</e>
          </input>
        </math>
      </region>
      <region left="351" top="1773" width="396" height="237" color="#000000" bgColor="#ffffff" fontSize="8" showInputData="false">
        <xyplot width="386" height="229" points="10" name="XYPlot">
          <chartstyle backcolor="White" bordercolor="Black" />
          <propertiessource index="1" sourcetype="PropertyGrid" />
          <grid gridcolor="LightGray" gridpattern="Dash" gridthickness="1" isxgrid="true" isygrid="true" isy2grid="false" />
          <xaxes xmin="0.05019737" xmax="9.365981" xtick="2" visible="False" decimalplaces="3" numberformat="General" />
          <yaxes ymin="1.493634" ymax="6.83446" ytick="2" visible="False" decimalplaces="3" numberformat="General" />
          <y2axes isy2axis="false" y2min="-1" y2max="1" y2tick="0.5" visible="True" decimalplaces="3" numberformat="General" />
          <title2d title="" titlefont="Arial, 10pt" titlefontcolor="Black" />
          <xylabel labelfont="Arial, 10pt" labelfontcolor="Black" tickfont="Arial, 8pt" tickfontcolor="Black" xlabel="" ylabel="" y2label="" />
          <legend isbordervisible="true" islegendvisible="false" legendbackcolor="White" legendbordercolor="Black" legendfont="Arial, 8pt" legendposition="NorthEast" textcolor="Black" />
          <traces>
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            <trace seriesname="" isy2data="false" isvisible="true" plotmethod="Labels" lineantialias="true" linecolor="Red" linethickness="1" linepattern="Solid" symbolantialias="true" symbolsize="8" symboltype="None" symbolborderthickness="1" symbolbordercolor="Black" symbolfillcolor="White" />
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          </traces>
          <input>
            <e type="operand">P.2</e>
            <e type="operand">Tr</e>
            <e type="operand">hl</e>
            <e type="operand" style="string">Point</e>
            <e type="operand" style="string">H</e>
            <e type="operand" style="string">.</e>
            <e type="function" args="3">gXY</e>
            <e type="operand">HP</e>
            <e type="function" args="1">z2xy</e>
            <e type="operand" style="string">o</e>
            <e type="operand">6</e>
            <e type="function" args="3">augment</e>
            <e type="function" args="1">eval</e>
            <e type="operand">4</e>
            <e type="operand">1</e>
            <e type="function" args="6">sys</e>
            <e type="operator" args="2">:</e>
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      </region>
      <region left="18" top="2007" width="177" height="143" color="#000000" fontSize="10">
        <math>
          <description active="true" position="Top" lang="eng">
            <content>
              <p>Circumcenter and perp. bisect.</p>
            </content>
          </description>
          <input>
            <e type="operand">μl</e>
            <e type="operand">μ.a</e>
            <e type="operand">a</e>
            <e type="operand">M.BC</e>
            <e type="function" args="2">g⟂</e>
            <e type="operator" args="2">:</e>
            <e type="operand">μ.b</e>
            <e type="operand">b</e>
            <e type="operand">M.AC</e>
            <e type="function" args="2">g⟂</e>
            <e type="operator" args="2">:</e>
            <e type="operand">μ.c</e>
            <e type="operand">c</e>
            <e type="operand">M.AB</e>
            <e type="function" args="2">g⟂</e>
            <e type="operator" args="2">:</e>
            <e type="operand">3</e>
            <e type="operand">1</e>
            <e type="function" args="5">sys</e>
            <e type="operator" args="2">:</e>
            <e type="operand">O</e>
            <e type="operand">μ.a</e>
            <e type="operand">μ.b</e>
            <e type="function" args="2">g∩</e>
            <e type="function" args="1">eval</e>
            <e type="operator" args="2">:</e>
            <e type="operand">C.O</e>
            <e type="operand">O</e>
            <e type="operand">z</e>
            <e type="operator" args="2">-</e>
            <e type="function" args="1">abs</e>
            <e type="operand">O</e>
            <e type="operand">A</e>
            <e type="operator" args="2">-</e>
            <e type="function" args="1">abs</e>
            <e type="operator" args="2">-</e>
            <e type="operator" args="2">:</e>
            <e type="operand">3</e>
            <e type="operand">1</e>
            <e type="function" args="5">line</e>
          </input>
        </math>
      </region>
      <region left="351" top="2007" width="396" height="237" color="#000000" bgColor="#ffffff" fontSize="8" showInputData="false">
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          <input>
            <e type="operand">P.3</e>
            <e type="operand">Tr</e>
            <e type="operand">μl</e>
            <e type="operand">MP</e>
            <e type="function" args="1">z2xy</e>
            <e type="operand" style="string">o</e>
            <e type="operand">6</e>
            <e type="function" args="3">augment</e>
            <e type="function" args="1">eval</e>
            <e type="operand" style="string">Point</e>
            <e type="operand" style="string">O</e>
            <e type="operand" style="string">.</e>
            <e type="function" args="3">gXY</e>
            <e type="operand" style="string">Circle</e>
            <e type="operand">O</e>
            <e type="operand">O</e>
            <e type="operand">A</e>
            <e type="operator" args="2">-</e>
            <e type="function" args="1">abs</e>
            <e type="function" args="3">gXY</e>
            <e type="operand">5</e>
            <e type="operand">1</e>
            <e type="function" args="7">sys</e>
            <e type="operator" args="2">:</e>
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      </region>
      <region left="18" top="2268" width="182" height="141" color="#000000" fontSize="10">
        <math>
          <description active="true" position="Top" lang="eng">
            <content>
              <p>Incenter and andgle bisect.</p>
            </content>
          </description>
          <input>
            <e type="operand">βl</e>
            <e type="operand">β.A</e>
            <e type="operand">b</e>
            <e type="operand">c</e>
            <e type="function" args="2">gβ</e>
            <e type="operator" args="2">:</e>
            <e type="operand">β.B</e>
            <e type="operand">a</e>
            <e type="operand">c</e>
            <e type="operator" args="1">-</e>
            <e type="function" args="2">gβ</e>
            <e type="operator" args="2">:</e>
            <e type="operand">β.C</e>
            <e type="operand">a</e>
            <e type="operand">b</e>
            <e type="function" args="2">gβ</e>
            <e type="operator" args="2">:</e>
            <e type="operand">3</e>
            <e type="operand">1</e>
            <e type="function" args="5">sys</e>
            <e type="operator" args="2">:</e>
            <e type="operand">I</e>
            <e type="operand">β.A</e>
            <e type="operand">β.B</e>
            <e type="function" args="2">g∩</e>
            <e type="function" args="1">eval</e>
            <e type="operator" args="2">:</e>
            <e type="operand">C.I</e>
            <e type="operand">I</e>
            <e type="operand">z</e>
            <e type="operator" args="2">-</e>
            <e type="function" args="1">abs</e>
            <e type="operand">a</e>
            <e type="operand">I</e>
            <e type="function" args="2">gδ</e>
            <e type="function" args="1">abs</e>
            <e type="operator" args="2">-</e>
            <e type="operator" args="2">:</e>
            <e type="operand">3</e>
            <e type="operand">1</e>
            <e type="function" args="5">line</e>
          </input>
        </math>
      </region>
      <region left="351" top="2268" width="396" height="237" color="#000000" bgColor="#ffffff" fontSize="8" showInputData="false">
        <xyplot width="386" height="229" points="10" name="XYPlot">
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          <input>
            <e type="operand">P.4</e>
            <e type="operand">Tr</e>
            <e type="operand">βl</e>
            <e type="operand" style="string">Point</e>
            <e type="operand" style="string">I</e>
            <e type="operand" style="string">.</e>
            <e type="function" args="3">gXY</e>
            <e type="operand" style="string">Circle</e>
            <e type="operand">I</e>
            <e type="operand">a</e>
            <e type="operand">I</e>
            <e type="function" args="2">gδ</e>
            <e type="function" args="1">abs</e>
            <e type="function" args="3">gXY</e>
            <e type="operand">4</e>
            <e type="operand">1</e>
            <e type="function" args="6">sys</e>
            <e type="operator" args="2">:</e>
          </input>
        </xyplot>
      </region>
      <region left="18" top="2502" width="195" height="255" color="#000000" fontSize="10">
        <math>
          <description active="true" position="Top" lang="eng">
            <content>
              <p>Excenters and ext. angle biscet.</p>
            </content>
          </description>
          <input>
            <e type="operand">β'l</e>
            <e type="operand">β'.A</e>
            <e type="operand">b</e>
            <e type="operand">c</e>
            <e type="operator" args="1">-</e>
            <e type="function" args="2">gβ</e>
            <e type="operator" args="2">:</e>
            <e type="operand">β'.B</e>
            <e type="operand">a</e>
            <e type="operand">c</e>
            <e type="function" args="2">gβ</e>
            <e type="operator" args="2">:</e>
            <e type="operand">β'.C</e>
            <e type="operand">a</e>
            <e type="operand">b</e>
            <e type="operator" args="1">-</e>
            <e type="function" args="2">gβ</e>
            <e type="operator" args="2">:</e>
            <e type="operand">3</e>
            <e type="operand">1</e>
            <e type="function" args="5">sys</e>
            <e type="operator" args="2">:</e>
            <e type="operand">I.A</e>
            <e type="operand">β'.B</e>
            <e type="operand">β'.C</e>
            <e type="function" args="2">g∩</e>
            <e type="function" args="1">eval</e>
            <e type="operator" args="2">:</e>
            <e type="operand">C.A</e>
            <e type="operand">I.A</e>
            <e type="operand">z</e>
            <e type="operator" args="2">-</e>
            <e type="function" args="1">abs</e>
            <e type="operand">a</e>
            <e type="operand">I.A</e>
            <e type="function" args="2">gδ</e>
            <e type="function" args="1">abs</e>
            <e type="operator" args="2">-</e>
            <e type="operator" args="2">:</e>
            <e type="operand">I.B</e>
            <e type="operand">β'.A</e>
            <e type="operand">β'.C</e>
            <e type="function" args="2">g∩</e>
            <e type="function" args="1">eval</e>
            <e type="operator" args="2">:</e>
            <e type="operand">C.B</e>
            <e type="operand">I.B</e>
            <e type="operand">z</e>
            <e type="operator" args="2">-</e>
            <e type="function" args="1">abs</e>
            <e type="operand">b</e>
            <e type="operand">I.B</e>
            <e type="function" args="2">gδ</e>
            <e type="function" args="1">abs</e>
            <e type="operator" args="2">-</e>
            <e type="operator" args="2">:</e>
            <e type="operand">I.C</e>
            <e type="operand">β'.A</e>
            <e type="operand">β'.B</e>
            <e type="function" args="2">g∩</e>
            <e type="function" args="1">eval</e>
            <e type="operator" args="2">:</e>
            <e type="operand">C.C</e>
            <e type="operand">I.C</e>
            <e type="operand">z</e>
            <e type="operator" args="2">-</e>
            <e type="function" args="1">abs</e>
            <e type="operand">c</e>
            <e type="operand">I.C</e>
            <e type="function" args="2">gδ</e>
            <e type="function" args="1">abs</e>
            <e type="operator" args="2">-</e>
            <e type="operator" args="2">:</e>
            <e type="operand">7</e>
            <e type="operand">1</e>
            <e type="function" args="9">line</e>
          </input>
        </math>
      </region>
      <region left="351" top="2502" width="396" height="237" color="#000000" bgColor="#ffffff" fontSize="8" showInputData="false">
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            <e type="operand">P.5</e>
            <e type="operand">Tr</e>
            <e type="operand">Sides</e>
            <e type="operand">A</e>
            <e type="operand">I</e>
            <e type="operand">B</e>
            <e type="operand">I</e>
            <e type="operand">C</e>
            <e type="function" args="5">stack</e>
            <e type="function" args="1">z2xy</e>
            <e type="operand">I.A</e>
            <e type="operand">I.B</e>
            <e type="operand">I.C</e>
            <e type="operand">I.A</e>
            <e type="function" args="4">stack</e>
            <e type="function" args="1">z2xy</e>
            <e type="operand" style="string">Point</e>
            <e type="operand" style="string">I</e>
            <e type="operand" style="string">.</e>
            <e type="function" args="3">gXY</e>
            <e type="operand" style="string">Circle</e>
            <e type="operand">I</e>
            <e type="operand">a</e>
            <e type="operand">I</e>
            <e type="function" args="2">gδ</e>
            <e type="function" args="1">abs</e>
            <e type="function" args="3">gXY</e>
            <e type="operand" style="string">Point</e>
            <e type="operand" style="string">I.A</e>
            <e type="operand" style="string">.</e>
            <e type="function" args="3">gXY</e>
            <e type="operand" style="string">Circle</e>
            <e type="operand">I.A</e>
            <e type="operand">a</e>
            <e type="operand">I.A</e>
            <e type="function" args="2">gδ</e>
            <e type="function" args="1">abs</e>
            <e type="function" args="3">gXY</e>
            <e type="operand" style="string">Point</e>
            <e type="operand" style="string">I.B</e>
            <e type="operand" style="string">.</e>
            <e type="function" args="3">gXY</e>
            <e type="operand" style="string">Circle</e>
            <e type="operand">I.B</e>
            <e type="operand">b</e>
            <e type="operand">I.B</e>
            <e type="function" args="2">gδ</e>
            <e type="function" args="1">abs</e>
            <e type="function" args="3">gXY</e>
            <e type="operand" style="string">Point</e>
            <e type="operand" style="string">I.C</e>
            <e type="operand" style="string">.</e>
            <e type="function" args="3">gXY</e>
            <e type="operand" style="string">Circle</e>
            <e type="operand">I.C</e>
            <e type="operand">c</e>
            <e type="operand">I.C</e>
            <e type="function" args="2">gδ</e>
            <e type="function" args="1">abs</e>
            <e type="function" args="3">gXY</e>
            <e type="operand">12</e>
            <e type="operand">1</e>
            <e type="function" args="14">sys</e>
            <e type="operator" args="2">:</e>
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      </region>
      <region left="18" top="2790" width="255" height="140" color="#000000" fontSize="10">
        <math>
          <description active="true" position="Top" lang="eng">
            <content>
              <p>Euler Line &amp; Feuerbach's circle</p>
            </content>
          </description>
          <input>
            <e type="operand">ε</e>
            <e type="operand">O</e>
            <e type="operand">H</e>
            <e type="function" args="2">gL</e>
            <e type="operator" args="2">:</e>
            <e type="operand">MH</e>
            <e type="operand">M.AH</e>
            <e type="operand">0.5</e>
            <e type="operand">A</e>
            <e type="operand">H</e>
            <e type="operator" args="2">+</e>
            <e type="bracket">(</e>
            <e type="operator" args="2">*</e>
            <e type="function" args="1">eval</e>
            <e type="operator" args="2">:</e>
            <e type="operand">M.BH</e>
            <e type="operand">0.5</e>
            <e type="operand">B</e>
            <e type="operand">H</e>
            <e type="operator" args="2">+</e>
            <e type="bracket">(</e>
            <e type="operator" args="2">*</e>
            <e type="function" args="1">eval</e>
            <e type="operator" args="2">:</e>
            <e type="operand">M.CH</e>
            <e type="operand">0.5</e>
            <e type="operand">C</e>
            <e type="operand">H</e>
            <e type="operator" args="2">+</e>
            <e type="bracket">(</e>
            <e type="operator" args="2">*</e>
            <e type="function" args="1">eval</e>
            <e type="operator" args="2">:</e>
            <e type="operand">3</e>
            <e type="operand">1</e>
            <e type="function" args="5">sys</e>
            <e type="operator" args="2">:</e>
            <e type="operand">F</e>
            <e type="operand">r.F</e>
            <e type="operand">1</e>
            <e type="operand">2</e>
            <e type="function" args="4">mat</e>
            <e type="operand">M.AH</e>
            <e type="operand">M.BH</e>
            <e type="operand">M.CH</e>
            <e type="function" args="3">gC</e>
            <e type="function" args="1">eval</e>
            <e type="operator" args="2">:</e>
            <e type="operand">3</e>
            <e type="operand">1</e>
            <e type="function" args="5">line</e>
          </input>
        </math>
      </region>
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            <trace seriesname="" isy2data="false" isvisible="true" plotmethod="Labels" lineantialias="true" linecolor="Black" linethickness="1" linepattern="Solid" symbolantialias="true" symbolsize="8" symboltype="None" symbolborderthickness="1" symbolbordercolor="Black" symbolfillcolor="White" />
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          <input>
            <e type="operand">P.6</e>
            <e type="operand">Tr</e>
            <e type="operand">ε</e>
            <e type="operand">H</e>
            <e type="operand">M.AH</e>
            <e type="operand">H</e>
            <e type="operand">M.BH</e>
            <e type="operand">H</e>
            <e type="operand">M.CH</e>
            <e type="function" args="6">stack</e>
            <e type="function" args="1">z2xy</e>
            <e type="function" args="1">eval</e>
            <e type="operand" style="string">Point</e>
            <e type="operand" style="string">G</e>
            <e type="operand" style="string">.</e>
            <e type="function" args="3">gXY</e>
            <e type="operand" style="string">Point</e>
            <e type="operand" style="string">H</e>
            <e type="operand" style="string">.</e>
            <e type="function" args="3">gXY</e>
            <e type="operand" style="string">Point</e>
            <e type="operand" style="string">O</e>
            <e type="operand" style="string">.</e>
            <e type="function" args="3">gXY</e>
            <e type="operand" style="string">Point</e>
            <e type="operand" style="string">F</e>
            <e type="operand" style="string">.</e>
            <e type="function" args="3">gXY</e>
            <e type="operand">HP</e>
            <e type="function" args="1">z2xy</e>
            <e type="operand" style="string">o</e>
            <e type="operand">6</e>
            <e type="function" args="3">augment</e>
            <e type="function" args="1">eval</e>
            <e type="operand">MH</e>
            <e type="function" args="1">z2xy</e>
            <e type="operand" style="string">o</e>
            <e type="operand">6</e>
            <e type="function" args="3">augment</e>
            <e type="function" args="1">eval</e>
            <e type="operand">MP</e>
            <e type="function" args="1">z2xy</e>
            <e type="operand" style="string">o</e>
            <e type="operand">6</e>
            <e type="function" args="3">augment</e>
            <e type="function" args="1">eval</e>
            <e type="operand" style="string">Circle</e>
            <e type="operand">F</e>
            <e type="operand">r.F</e>
            <e type="function" args="1">abs</e>
            <e type="function" args="3">gXY</e>
            <e type="operand">11</e>
            <e type="operand">1</e>
            <e type="function" args="13">sys</e>
            <e type="operator" args="2">:</e>
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      <region top="3033" color="#000000">
        <area terminator="true" />
      </region>
    </region>
    <region top="3051" color="#000000">
      <area single="true" collapsed="true" />
    </region>
    <region top="3069" color="#000000">
      <area collapsed="false">
        <title lang="eng">
          <content>
            <p>Figure</p>
          </content>
        </title>
      </area>
      <region top="3096" color="#000000">
        <area collapsed="true">
          <title lang="eng">
            <content>
              <p>Plot elements</p>
            </content>
          </title>
        </area>
        <region left="54" top="3123" width="141" height="33" color="#000000" fontSize="10">
          <math>
            <input>
              <e type="operand">E</e>
              <e type="operand">1</e>
              <e type="operand">1</e>
              <e type="function" args="3">el</e>
              <e type="operand" style="string">Triangle</e>
              <e type="operator" args="2">:</e>
            </input>
          </math>
        </region>
        <region left="360" top="3123" width="79" height="33" color="#000000" fontSize="10">
          <math>
            <input>
              <e type="operand">E</e>
              <e type="operand">1</e>
              <e type="operand">2</e>
              <e type="function" args="3">el</e>
              <e type="operand">Tr</e>
              <e type="operator" args="2">:</e>
            </input>
          </math>
        </region>
        <region left="54" top="3159" width="191" height="35" color="#000000" fontSize="10">
          <math>
            <input>
              <e type="operand">E</e>
              <e type="operand">E</e>
              <e type="function" args="1">rows</e>
              <e type="operand">1</e>
              <e type="operator" args="2">+</e>
              <e type="operand">1</e>
              <e type="function" args="3">el</e>
              <e type="operand" style="string">Sides</e>
              <e type="operator" args="2">:</e>
            </input>
          </math>
        </region>
        <region left="360" top="3159" width="152" height="35" color="#000000" fontSize="10">
          <math>
            <input>
              <e type="operand">E</e>
              <e type="operand">E</e>
              <e type="function" args="1">rows</e>
              <e type="operand">2</e>
              <e type="function" args="3">el</e>
              <e type="operand">Sides</e>
              <e type="operator" args="2">:</e>
            </input>
          </math>
        </region>
        <region left="54" top="3195" width="231" height="35" color="#000000" fontSize="10">
          <math>
            <input>
              <e type="operand">E</e>
              <e type="operand">E</e>
              <e type="function" args="1">rows</e>
              <e type="operand">1</e>
              <e type="operator" args="2">+</e>
              <e type="operand">1</e>
              <e type="function" args="3">el</e>
              <e type="operand" style="string">Mid Points</e>
              <e type="operator" args="2">:</e>
            </input>
          </math>
        </region>
        <region left="360" top="3195" width="353" height="38" color="#000000" fontSize="10">
          <math>
            <input>
              <e type="operand">E</e>
              <e type="operand">E</e>
              <e type="function" args="1">rows</e>
              <e type="operand">2</e>
              <e type="function" args="3">el</e>
              <e type="operand">MP</e>
              <e type="function" args="1">z2xy</e>
              <e type="operand" style="string">o</e>
              <e type="operand">6</e>
              <e type="function" args="3">augment</e>
              <e type="function" args="1">eval</e>
              <e type="operator" args="2">:</e>
            </input>
          </math>
        </region>
        <region left="54" top="3231" width="207" height="35" color="#000000" fontSize="10">
          <math>
            <input>
              <e type="operand">E</e>
              <e type="operand">E</e>
              <e type="function" args="1">rows</e>
              <e type="operand">1</e>
              <e type="operator" args="2">+</e>
              <e type="operand">1</e>
              <e type="function" args="3">el</e>
              <e type="operand" style="string">Medians</e>
              <e type="operator" args="2">:</e>
            </input>
          </math>
        </region>
        <region left="360" top="3231" width="128" height="35" color="#000000" fontSize="10">
          <math>
            <input>
              <e type="operand">E</e>
              <e type="operand">E</e>
              <e type="function" args="1">rows</e>
              <e type="operand">2</e>
              <e type="function" args="3">el</e>
              <e type="operand">ml</e>
              <e type="operator" args="2">:</e>
            </input>
          </math>
        </region>
        <region left="54" top="3267" width="215" height="35" color="#000000" fontSize="10">
          <math>
            <input>
              <e type="operand">E</e>
              <e type="operand">E</e>
              <e type="function" args="1">rows</e>
              <e type="operand">1</e>
              <e type="operator" args="2">+</e>
              <e type="operand">1</e>
              <e type="function" args="3">el</e>
              <e type="operand" style="string">Centroid</e>
              <e type="operator" args="2">:</e>
            </input>
          </math>
        </region>
        <region left="360" top="3267" width="280" height="36" color="#000000" fontSize="10">
          <math>
            <input>
              <e type="operand">E</e>
              <e type="operand">E</e>
              <e type="function" args="1">rows</e>
              <e type="operand">2</e>
              <e type="function" args="3">el</e>
              <e type="operand" style="string">Point</e>
              <e type="operand" style="string">G</e>
              <e type="operand" style="string">.</e>
              <e type="function" args="3">gXY</e>
              <e type="operator" args="2">:</e>
            </input>
          </math>
        </region>
        <region left="54" top="3312" width="223" height="35" color="#000000" fontSize="10">
          <math>
            <input>
              <e type="operand">E</e>
              <e type="operand">E</e>
              <e type="function" args="1">rows</e>
              <e type="operand">1</e>
              <e type="operator" args="2">+</e>
              <e type="operand">1</e>
              <e type="function" args="3">el</e>
              <e type="operand" style="string">Altitudes</e>
              <e type="operator" args="2">:</e>
            </input>
          </math>
        </region>
        <region left="360" top="3312" width="128" height="35" color="#000000" fontSize="10">
          <math>
            <input>
              <e type="operand">E</e>
              <e type="operand">E</e>
              <e type="function" args="1">rows</e>
              <e type="operand">2</e>
              <e type="function" args="3">el</e>
              <e type="operand">hl</e>
              <e type="operator" args="2">:</e>
            </input>
          </math>
        </region>
        <region left="54" top="3357" width="239" height="35" color="#000000" fontSize="10">
          <math>
            <input>
              <e type="operand">E</e>
              <e type="operand">E</e>
              <e type="function" args="1">rows</e>
              <e type="operand">1</e>
              <e type="operator" args="2">+</e>
              <e type="operand">1</e>
              <e type="function" args="3">el</e>
              <e type="operand" style="string">Orthocenter</e>
              <e type="operator" args="2">:</e>
            </input>
          </math>
        </region>
        <region left="360" top="3357" width="280" height="36" color="#000000" fontSize="10">
          <math>
            <input>
              <e type="operand">E</e>
              <e type="operand">E</e>
              <e type="function" args="1">rows</e>
              <e type="operand">2</e>
              <e type="function" args="3">el</e>
              <e type="operand" style="string">Point</e>
              <e type="operand" style="string">H</e>
              <e type="operand" style="string">.</e>
              <e type="function" args="3">gXY</e>
              <e type="operator" args="2">:</e>
            </input>
          </math>
        </region>
        <region left="54" top="3402" width="271" height="35" color="#000000" fontSize="10">
          <math>
            <input>
              <e type="operand">E</e>
              <e type="operand">E</e>
              <e type="function" args="1">rows</e>
              <e type="operand">1</e>
              <e type="operator" args="2">+</e>
              <e type="operand">1</e>
              <e type="function" args="3">el</e>
              <e type="operand" style="string">Altitudes foots</e>
              <e type="operator" args="2">:</e>
            </input>
          </math>
        </region>
        <region left="360" top="3402" width="429" height="63" color="#000000" fontSize="10">
          <math>
            <input>
              <e type="operand">E</e>
              <e type="operand">E</e>
              <e type="function" args="1">rows</e>
              <e type="operand">2</e>
              <e type="function" args="3">el</e>
              <e type="operand">HP</e>
              <e type="function" args="1">z2xy</e>
              <e type="operand" style="string">o</e>
              <e type="operand">6</e>
              <e type="function" args="3">augment</e>
              <e type="function" args="1">eval</e>
              <e type="operand">H</e>
              <e type="operand">M.AH</e>
              <e type="operand">H</e>
              <e type="operand">M.BH</e>
              <e type="operand">H</e>
              <e type="operand">M.CH</e>
              <e type="function" args="6">stack</e>
              <e type="function" args="1">z2xy</e>
              <e type="function" args="1">eval</e>
              <e type="operand">2</e>
              <e type="operand">1</e>
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              <e type="operand">E</e>
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              <e type="operand">1</e>
              <e type="function" args="3">el</e>
              <e type="operand" style="string">Perp. Bisectors</e>
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          <math>
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              <e type="operand">E</e>
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              <e type="function" args="3">el</e>
              <e type="operand">μl</e>
              <e type="operator" args="2">:</e>
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              <e type="operand">E</e>
              <e type="function" args="1">rows</e>
              <e type="operand">1</e>
              <e type="operator" args="2">+</e>
              <e type="operand">1</e>
              <e type="function" args="3">el</e>
              <e type="operand" style="string">Circumcenter</e>
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          <math>
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              <e type="operand">E</e>
              <e type="function" args="1">rows</e>
              <e type="operand">2</e>
              <e type="function" args="3">el</e>
              <e type="operand" style="string">Point</e>
              <e type="operand" style="string">O</e>
              <e type="operand" style="string">.</e>
              <e type="function" args="3">gXY</e>
              <e type="operand" style="string">Circle</e>
              <e type="operand">O</e>
              <e type="operand">O</e>
              <e type="operand">A</e>
              <e type="operator" args="2">-</e>
              <e type="function" args="1">abs</e>
              <e type="function" args="3">gXY</e>
              <e type="operand">2</e>
              <e type="operand">1</e>
              <e type="function" args="4">sys</e>
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              <e type="operand">E</e>
              <e type="function" args="1">rows</e>
              <e type="operand">1</e>
              <e type="operator" args="2">+</e>
              <e type="operand">1</e>
              <e type="function" args="3">el</e>
              <e type="operand" style="string">Incenter</e>
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        <region left="360" top="3573" width="369" height="77" color="#000000" fontSize="10">
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            <input>
              <e type="operand">E</e>
              <e type="operand">E</e>
              <e type="function" args="1">rows</e>
              <e type="operand">2</e>
              <e type="function" args="3">el</e>
              <e type="operand">A</e>
              <e type="operand">I</e>
              <e type="operand">B</e>
              <e type="operand">I</e>
              <e type="operand">C</e>
              <e type="function" args="5">stack</e>
              <e type="function" args="1">z2xy</e>
              <e type="function" args="1">eval</e>
              <e type="operand" style="string">Point</e>
              <e type="operand" style="string">I</e>
              <e type="operand" style="string">.</e>
              <e type="function" args="3">gXY</e>
              <e type="operand" style="string">Circle</e>
              <e type="operand">I</e>
              <e type="operand">a</e>
              <e type="operand">I</e>
              <e type="function" args="2">δ</e>
              <e type="function" args="1">abs</e>
              <e type="function" args="3">gXY</e>
              <e type="operand">3</e>
              <e type="operand">1</e>
              <e type="function" args="5">sys</e>
              <e type="operator" args="2">:</e>
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          <math>
            <input>
              <e type="operand">E</e>
              <e type="operand">E</e>
              <e type="function" args="1">rows</e>
              <e type="operand">1</e>
              <e type="operator" args="2">+</e>
              <e type="operand">1</e>
              <e type="function" args="3">el</e>
              <e type="operand" style="string">Ext. A. Bisec.</e>
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          </math>
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        <region left="360" top="3654" width="373" height="190" color="#000000" fontSize="10">
          <math>
            <input>
              <e type="operand">E</e>
              <e type="operand">E</e>
              <e type="function" args="1">rows</e>
              <e type="operand">2</e>
              <e type="function" args="3">el</e>
              <e type="operand">I.A</e>
              <e type="operand">I.B</e>
              <e type="operand">I.C</e>
              <e type="operand">I.A</e>
              <e type="function" args="4">stack</e>
              <e type="function" args="1">z2xy</e>
              <e type="function" args="1">eval</e>
              <e type="operand" style="string">Point</e>
              <e type="operand" style="string">I.A</e>
              <e type="operand" style="string">.</e>
              <e type="function" args="3">gXY</e>
              <e type="operand" style="string">Circle</e>
              <e type="operand">I.A</e>
              <e type="operand">a</e>
              <e type="operand">I.A</e>
              <e type="function" args="2">gδ</e>
              <e type="function" args="1">abs</e>
              <e type="function" args="3">gXY</e>
              <e type="operand" style="string">Point</e>
              <e type="operand" style="string">I.B</e>
              <e type="operand" style="string">.</e>
              <e type="function" args="3">gXY</e>
              <e type="operand" style="string">Circle</e>
              <e type="operand">I.B</e>
              <e type="operand">b</e>
              <e type="operand">I.B</e>
              <e type="function" args="2">gδ</e>
              <e type="function" args="1">abs</e>
              <e type="function" args="3">gXY</e>
              <e type="operand" style="string">Point</e>
              <e type="operand" style="string">I.C</e>
              <e type="operand" style="string">.</e>
              <e type="function" args="3">gXY</e>
              <e type="operand" style="string">Circle</e>
              <e type="operand">I.C</e>
              <e type="operand">c</e>
              <e type="operand">I.C</e>
              <e type="function" args="2">gδ</e>
              <e type="function" args="1">abs</e>
              <e type="function" args="3">gXY</e>
              <e type="operand">7</e>
              <e type="operand">1</e>
              <e type="function" args="9">sys</e>
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              <e type="operand">E</e>
              <e type="operand">E</e>
              <e type="function" args="1">rows</e>
              <e type="operand">1</e>
              <e type="operator" args="2">+</e>
              <e type="operand">1</e>
              <e type="function" args="3">el</e>
              <e type="operand" style="string">Euler Line</e>
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        <region left="351" top="3843" width="129" height="36" color="#000000" fontSize="10">
          <math>
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              <e type="operand">E</e>
              <e type="operand">E</e>
              <e type="function" args="1">rows</e>
              <e type="operand">2</e>
              <e type="function" args="3">el</e>
              <e type="operand">ε</e>
              <e type="operand">1</e>
              <e type="operand">1</e>
              <e type="function" args="3">sys</e>
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          <math>
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              <e type="operand">E</e>
              <e type="operand">E</e>
              <e type="function" args="1">rows</e>
              <e type="operand">1</e>
              <e type="operator" args="2">+</e>
              <e type="operand">1</e>
              <e type="function" args="3">el</e>
              <e type="operand" style="string">Feuerbach's C.</e>
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          <math>
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              <e type="operand">E</e>
              <e type="operand">E</e>
              <e type="function" args="1">rows</e>
              <e type="operand">2</e>
              <e type="function" args="3">el</e>
              <e type="operand" style="string">Point</e>
              <e type="operand" style="string">F</e>
              <e type="operand" style="string">.</e>
              <e type="function" args="3">gXY</e>
              <e type="operand">MH</e>
              <e type="function" args="1">z2xy</e>
              <e type="operand" style="string">o</e>
              <e type="operand">6</e>
              <e type="function" args="3">augment</e>
              <e type="function" args="1">eval</e>
              <e type="operand" style="string">Circle</e>
              <e type="operand">F</e>
              <e type="operand">r.F</e>
              <e type="function" args="1">abs</e>
              <e type="function" args="3">gXY</e>
              <e type="operand">3</e>
              <e type="operand">1</e>
              <e type="function" args="5">sys</e>
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          <ul>
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            <e type="operand">Π</e>
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            <e type="operand">Π</e>
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            <e type="operand">1</e>
            <e type="operand">1</e>
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          <e type="operand">Alvaro</e>
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          <e type="operand">4</e>
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          <e type="operand" style="string">1.0.8348.30405</e>
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