The article contains classroom enrichment suggestions related to Pythagorean triples. Topics discussed for student exploration can be adapted for any level from early algebra through early college.
Lawrence O. Cannon, cannon@math.usu.edu, teaches mathematics at Utah State University in Logan and is a co-creator of the National Library of Virtual Manipulatives (www.nlvm.usu.edu), a collection of teaching and learning tools for pre-K through college students and teachers. He has long been interested in relationships between geometry and number theory.