At the Geometry Center.
Java applet demonstrating the catenary.
Includes collections from various areas in which ideas from discrete and computational geometry meet real world applications.
Usenet clippings, web pointers, lecture notes, research excerpts, papers, abstracts, programs, problems, and other stuff related to discrete and computational geometry.
Graphics and links for various packing, tiling and covering problems.
Cabri constructions for the demonstration of the basic concepts of hyperbolic geometry in the Poincare disc model.
History of Mathematics, very strong on geometry.
Mathematical descriptions and ray-traced images of various types of Steiner surfaces
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.
Includes Steiner's Porism and the arbelos.