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 ...

Triangles, squares, rectangles and pentagons are examples of polygons. A polyhedron is a 3D shape with faces made from polygons. Cubes, cuboids, tetrahedron and prisms are examples of polyhedra.