The Platonic Solids
"Regular polyhedra" or "Platonic solids" are polyhedra with congruent regular polygons as faces where the same number of faces meet at each vertice. There are exactly five Platonic solids:
- Regular tetrahedron
(4 vertices, 6 edges, 4 equilateral triangles as faces)
- Regular hexahedron or cube
(8 vertices, 12 edges, 6 squares as faces)
- Regular octahedron
(6 vertices, 12 edges, 8 equilateral triangles as faces)
- Regular dodecahedron
(20 vertices, 30 edges, 12 regular pentagons as faces)
- Regular icosahedron
(12 vertices, 30 edges, 20 equilateral triangles as faces)