Icosahedron

Revision as of 12:49, 9 November 2007 by 1=2 (talk | contribs)

An icosahedron is any polyhedron with twenty faces. In fact, the term is almost always used to refer specifically to a polyhedron with twenty triangular faces, and modifying words or alternate terminology are used to refer to other twenty-sided polyhedra, as in the case of the rhombic icosahedron.

The regular icosahedron is one of the five Platonic solids: its faces are all equilateral triangles. It has twenty vertices and thirty edges. Five faces meet at each vertex. It is dual to the regular dodecahedron.

See Also

This article is a stub. Help us out by expanding it.

Invalid username
Login to AoPS