Dynamic Geometry Sketches
(Interactive dynamic geometry sketches with JavaSketchpad, Cinderella & GeoGebra)
Michael de Villiers
Dept of Mathematics & Statistics
Kennesaw State University, USA
(Last Update: 8 June 2009)
Visit p. 4 of my homepage for downloadable articles Downloadable articles on Math & Math Ed
Circumcyclicquad
Read my paper An interesting duality in geometry
Free Java applets provided by
JavaScript
Kit
Explorations for
Students
Area Ratios of Octagons/Parallelograms
De Villiers points of a triangle
Fermat-Torricelli Point Generalizations (New)
Generalizations of
Cross's Theorem
A generalization of
Neuberg's Theorem and the Simson line
Haruki's Theorem (Three Overlapping Circles)
Locus Problem (fixed chords in circle)
Napoleon's Theorem and some Generalizations & Variations
Nine-point conic and
Euler line generalization
Para-Hexagon Concurrency Theorem (New)
Spieker conic and Nagel line generalization
Van Aubel's Theorem and some Generalizations
Other Activities and Links
Dynamically Explore Elliptic (Spherical) Geometry
Dynamically Explore Hyperbolic Geometry
The Importance of Geometric Literacy in Engineering & Design
By Michael de Villiers at profmd@mweb.co.za