https://github.com/davepinch/pinchy.cc/blob/master/content/topics/mathematics/shapes/polyhedron/polyhedron.md
Polyhedron (Wikipedia) In geometry, a polyhedron (pl.: polyhedra or polyhedrons; from Greek πολύ (poly-) ‘many’, and ἕδρον (-hedron) ‘base, seat’) is a three-dimensional shape with flat polygonal faces, straight edges and sharp corners or vertices.
