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 slides.