Polygon Learning Aid V2

An update to the "Triangle Learning Aid" (here: https://www.thingiverse.com/thing:2519895)
+ Improved male snap
+ Improved number recesses
+ Extended description -- Applicable to 4+ sided polygons (as well as triangles)

TrianglePolygon properties learning/teaching aid.
* Shows each side length
* Shows each angle
* Explore properties of "types" of triangles (equilateral, isosceles, scalene)
* Explore properties of "types" of quadrilaterals (squares, rectangles, parallelograms, etc)
* Explore properties of "types" of n-sided polygons
* Sum of angles exercises
* Regular/irregular polygon exercises
* Breaking polygons down to triangles exercises
* Template to draw "arbitrary" polygons (inside edges are smooth)
* Side lengths from ~75mm to ~135mm

Decide the max number of sides you'll want and print an A and B for each side (flat sides down). Pieces just snap together. Vigorously slide the A and B together/apart about ten times to work in the slide