Figure 1: The Platonic solids. Top: the tetrahedron (self-dual). Middle: the cube and the octahedron (dual to one another). Bottom: the dodecahedron and the icosahedron (dual to one another).
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Figure 1 shows the five regular polyhedra, or Platonic solids.
Figure 1: The Platonic solids.
Top: the tetrahedron (self-dual).
Middle: the cube and the octahedron (dual to one another).
Bottom: the dodecahedron and the icosahedron (dual to one another).
In the following tables and formulas, a is
the length of an edge, 
the dihedral angle at each edge, R
the radius of the circumscribed sphere, r the radius of the
inscribed sphere, V the volume, S the total area, v the total
number of vertices, e the total number of edges, f the total
number of faces, p the number of edges in a face, and q the number
of edges meeting at a vertex.
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The Geometry Center Home PageSilvio Levy
Wed Oct 4 16:41:25 PDT 1995
This document is excerpted from the 30th Edition of the CRC Standard Mathematical Tables and Formulas (CRC Press). Unauthorized duplication is forbidden.