Faces of the Regular Icosahedron and Five Regular Tetrahedra
The set of faces of a regular icosahedron can be rearranged to be the faces of five equal regular tetrahedra.
 G. N. Frederickson, Dissections: Plane & Fancy, New York: Cambridge University Press, 2003 p. 246.
"Faces of the Regular Icosahedron and Five Regular Tetrahedra"
Wolfram Demonstrations Project
Published: August 9 2013