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Topic: Exploring and explaining quadrilateral properties, and more
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Michael de Villiers

Posts: 281
Registered: 12/3/04
Exploring and explaining quadrilateral properties, and more
Posted: Nov 11, 2011 12:36 AM
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The Student Explorations of my Dynamic Geometry Sketches site has been updated with an online activity about "Exploring and explaining quadrilateral properties" - go to

An interactive link "Some generalizations of Viviani's Theorem" has also been added to:

My new homepage is at and has been updated with:
1) "Simply Symmetric" article - discusses & illustrates the value and use of symmetry, PDF (2011)
2) Nov 2011 Math e-Newsletter
3) mathematical/mathematics education quote
4) mathematics/science cartoon.

Message was edited by: Michael de Villiers

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