For most people, the word “polyhedron” conjures up an image of a cube, a tetrahedron, or something similar—a solid figure with flat faces. If the polyhedron is regular, each face has the same size and ...

Polyhedrons come in all shapes and sizes. Anything that has multiple faces joined at their edges can be a polyhedron. Picture Earth as a six-sided cube. Or as a triangular pyramid with four faces ...