An icosahedron is a geometric solid consisting of twenty faces. Each
face is an equilateral triangle and every vertex of the icosahedron
is formed by five triangular faces that come together.
This document describes how to build an icosahedron as a
class project. The size is up to you. During the summer of 1994,
students in a summer enrichment program at the University of
Minnesota's Geometry Center built a
"world record" icosahedron
with edge lengths just under 37 inches.