The Wotch Directory
Science > Math > Geometry
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A Gallery of Interactive On-Line Geometry
At the Geometry Center.
http://www.geom.uiuc.edu/apps/gallery.html
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A New Way to Calculate a Triangle's Area
Using the length of the three sides. The proof is better understood than the old one.
http://hometown.aol.com/tienchien/myhomepage/find_triangle_area.html
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Archimedes' Book of Lemmas
A collection of all 15 propositions from Archimedes' Book of Lemmas with complete proofs, each accompanied by a Java illustration.
http://www.cut-the-knot.org/Curriculum/Geometry/BookOfLemmas/index.shtml
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Bette Veteto's Homepage
History of Mathematics, very strong on geometry.
http://www.people.memphis.edu/~brveteto/
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Bob's Pages
A collection of interactive geometry applets. Topics include polyhedra, Poncelet's porism, Soddy's hexlet, Mandelbrot set, Steiner porism, Pappus's chain, Repulsion polyhedra and stereo pictures.
http://members.ozemail.com.au/~llan/
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Center of Points in 2- or Higher-dimensional Space
It provides important formulations for finding a center of points in 2 or higher dimensional space. It can be used in drawing delauney triagulation and voronoi diagram in two or higher dimensions. It also describes how many points are required in defining a center in n-dimensional space.
http://www.geocities.com/kiranisingh/center.html
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Conjectures Produced by the Program Graffiti
Graffiti is a computer program that makes conjectures in mathematics and chemistry. Links to the conjectures and bibliography.
http://cms.dt.uh.edu/faculty/delavinae/research/wowref.htm
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Cuboid and Cube Surface Distances
A java applet with substantial analysis related to distances on a rectangular box.
http://www.btinternet.com/~se16/js/cuboid.htm
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Cut the Knot
Features articles about specific problems, illusions, and puzzles. Includes diagrams.
http://www.cut-the-knot.org/geometry.shtml
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