Gardner, M. 1961. The five Platonic solids. In The 2nd Scientific American Book of Mathematical Puzzles and Diversions . Tetrahedrons in nature and architecture, and puzzles involving this simplest polyhedron. Silverman, A. 1997.
Comments are welcome.
He is the author of The Mathematical Tourist , Islands of Truth , Newton's Clock , Fatal Defect , and The Jungles of Randomness . For children ages 10 and up. Copyright 1999 Science Service . All rights reserved.