Date: Aug 4, 2008 4:04 AM
Author: Michael de Villiers
Subject: Classifying quads visually

My dynamic geometry sketches Link at
has been updated with Desargues' Theorem, Haruki's Theorem, and Power Lines of a Triangle. Perhaps of special interest to teachers is the new investigation "Classifying Quadrilaterals Visually" under Student Explorations.
My homepage now also includes a Guest Book at the bottom - please feel free to sign and leave a comment if you wish.