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 ...

Besides the regular and semiregular solids, there are just ninety-two other convex polyhedra with regular faces. In 1966, the American mathematician Norman W. Johnson, a student of H.S.M. Coxeter at ...

Polyhedra, in their infinite variety, have been objects of study for more than 2500 years. In ancient Greece, contemplation of the regular polyhedra and a few semiregular derivative shapes led to the ...

Other 3D shapes with least one curved surface are not polyhedra. A 3D shape with regular polygonal faces, meeting at equal angles, is a platonic solid. There are five platonic solids, the ...