Date: Jan 27, 2013 5:39 AM
Author: Michael de Villiers
Subject: Clough's Theorem - a variation of Viviani & some generalizations

Some here might be interested in the publication in Pythagoras of my ICME 12 Regular Lecture "An illustration of the explanatory and discovery functions of proof" which deals with a variation of Viviani's theorem and some generalizations. Go to: 

An interactive sketch of the result is also available at my Dynamic Geometry Sketches site at: