Dynamic Geometry Sketches
(Interactive dynamic geometry sketches with JavaSketchpad, Cinderella & GeoGebra)
Michael de Villiers
Dept of Mathematics & Statistics
Kennesaw State University, USA
(Last Update: 21 January 2010)
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
NEW!!! Download PDF papers/books of mine for sale
Explorations for
Students
Affine Equivalence of Cubic Polynomials
Area Ratios of Octagons/Parallelograms: IMTS problem
Circumscribed Quadrilateral Perpendicular-Bisectors Theorem (New)
Cyclic Quadrilateral Incentre-Rectangle (New)
De Villiers points of a triangle
Fermat-Torricelli Point Generalizations
Generalizations of
Cross's Theorem
A generalization of
Neuberg's Theorem and the Simson line (Updated with Ellipse by Reference Triangle)
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
Quadrilateral Similar-Triangles Collinearity Theorem
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
Wolfram Alpha Online Computational Knowledge Engine
By Michael de Villiers at profmd@mweb.co.za
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