Dynamic Geometry Sketches
(Interactive dynamic geometry sketches with JavaSketchpad, Cinderella & GeoGebra)
Michael de Villiers
Dept of Mathematics & Statistics
Kennesaw State University, USA
(Last Update: 18 May 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)
Concurrency and Euler line locus result (* New)
Cyclic Quadrilateral Incentre-Rectangle (New)
De Villiers points of a triangle
Fermat-Torricelli Point Generalizations
Generalizing the Nagel line to Circumscribed Polygons by Analogy & Constructive Defining (New)
Generalizations of
Cross's (Vecten'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 (or Euler) centre & Maltitudes of Cyclic Quadrilateral (New)
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
Cut-the-Knot - Interactive Mathematics Miscellany and Puzzles (New)
Dynamically Explore Elliptic (Spherical) Geometry
Dynamically Explore Hyperbolic Geometry
Mathematics Archives - Topics in Mathematics - Geometry (New)
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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