Dynamic Geometry Sketches

(Interactive dynamic geometry sketches with JavaSketchpad, Cinderella & GeoGebra)

Michael de Villiers

Dept of Mathematics & Statistics

Kennesaw State University, USA

(Last Update, Student Explorations & Geometric Literacy in Design: 18 January 2009)

Visit p. 4 of my homepage for downloadable articles Downloadable articles on Math & Math Ed

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Circumcyclicquad

Read my paper An interesting duality in geometry

Free Java applets provided by
JavaScript Kit

Explorations for Students (Updated)

Area Ratios of Octagons/Parallelograms

Balancing Quadrilaterals

Desargues' Theorem

De Villiers points of a triangle (New)

Eight Point Conic

Generalizations of Cross's Theorem

Haruki's Theorem (Three Overlapping Circles)

Locus Problem (fixed chords in circle) (New)

Napoleon's Theorem and some Generalizations & Variations

Nine-point conic and Euler line generalization

Octagon Centroids

Power Lines of a Triangle

Spieker conic and Nagel line generalization

Van Aubel's Theorem and some Generalizations

Other Activities and Links

Online Graphing Calculator

Solve Equations Numerically

Dynamically Explore Elliptic (Spherical) Geometry

Dynamically Explore Hyperbolic Geometry

Logic & Strategy Games

The Importance of Geometric Literacy in Engineering & Design (New)

By Michael de Villiers at [email protected]

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