Date: Jan 27, 2013 5:38 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: http://www.pythagoras.org.za/index.php/pythagoras/article/view/193

An interactive sketch of the result is also available at my Dynamic Geometry Sketches site at: http://frink.machighway.com/~dynamicm/clough.html