The+Pythagorean+Theorem

Proof of the Theorem cut-the-knot.org (tonns of info.

Java Applets  sunsite.ubc.ca I like this one, I like puzzles I think this one is the easiest to understand</li> </ol>

Pythagorean Triples <ol type="I"> math.uic.edu</a></li> cut-the-knot.org</a></li> </ol>