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 ...

A 3D shape with regular polygonal faces, meeting at equal angles, is a platonic solid. There are five platonic solids, the tetrahedron, cube, octahedron, dodecahedron and icosahedron. A prism is a ...

"platonic solid" tracks the separate progressions of parker and madison, as they each find themselves exploring and embracing same-sex relationships. madison, struggling with depression and a ...