http://www.flashcardexchange.com/tag/pythagoras www.flashcardexchange.com: pythagoras Flashcards en-us Sun, 07 Sep 2008 02:56:52 PDT Sun, 07 Sep 2008 02:56:52 PDT support@flashcardexchange.com 720 http://www.flashcardexchange.com/flashcards/view/399877 a2 + b2 =c2 Mon, 30 Oct 2006 12:00:00 PST http://www.flashcardexchange.com/flashcards/view/399877