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Pick's Theorem - http://www.cut-the-knot.org/ctk/Pick.shtml
Describes a theorem for finding an area of simple lattice polygons. Includes proof and Java applet simulation. |
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The Mathematical Atlas - Polytopes and Polyhedra - http://www.math.niu.edu/~rusin/known-math/index/52BXX.html
Collection of discussions regarding volume, vertices, dissection, g-holed tori, and other subjects. |
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The Charged Particles Model - http://presh.com/hovinga
Polytopes and optimal packing of p points in n dimensional spheres. Includes a java applet based on a model which allows for generation of multidimensional regular and semi-regular polytopes. |
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Guy's Polyhedra Pages - http://www.queenhill.demon.co.uk/polyhedra/
Vertex figures, filling, faceting diagrams, stellation, defining polytopes through generators, trimethoric and trisynaptic polyhedra, space-filling polyhedra, lost stellations of the icosahedron, and links. |
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Regular Polytopes - http://www.math.rutgers.edu/~erowland/polygons.html
Derivation of volume equations for regular polygons, polyhedra, and polytopes, with images. |