A polygon is regular if it is uniform and its faces are all alike. The regular convex polyhedra are the five Platonic solids, which have been known since classical Greece. The ancient Greek ...

Six triangles make a flat sheet that can't be folded into a corner. So only three Platonic solids can be made from triangles. Image caption, Three squares make the corner of a cube. However four ...

Johnson. Berman made paper models of the Platonic solids, the Archimedean solids, , a prism with a triangular base, and an antiprism with a square base, and the Johnson solids for a total of 112 ...