In three-dimensional space, a __Platonic solid__ is a Regular polyhedron, Convex set polyhedron. It is constructed by Congruence (geometry) (identical in shape and size), regular polygon (all angles equal and all sides equal), polygonal Face (geometry) with the same number of faces meeting at each Vertex (geometry) Five solids meet these criteria: - wikipedia
Geometers have studied the Platonic solids for thousands of years. They are named for the Ancient Greek philosophy Plato who hypothesized in one of his dialogues, the ''Timaeus (dialogue)'', that the classical elements were made of these regular solids.
# See also