These two examples demonstrate how "SVG" work.
Easy to see that the popular AutCad is a huge
propriatary data base. Notice that PDF is
essntially Bézier based for shapes and text.

From there, you can draw some basic Edu stuff that
can't be done from functions or from simple point
geometric junctions.

Jean

De Casteljau SVG Smath Demo.sm (39 KiB) downloaded 71 time(s).
De Casteljau Minaret.sm (21 KiB) downloaded 55 time(s).