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Pick's Theorem -
Describes a theorem for finding an area of simple lattice polygons. Includes proof and Java applet simulation.
http://www.cut-the-knot.org/ctk/Pick.shtml The Mathematical Atlas - Polytopes and Polyhedra -
Collection of discussions regarding volume, vertices, dissection, g-holed tori, and other subjects.
http://www.math.niu.edu/~rusin/known-math/index/52BXX.html The Charged Particles Model -
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.
http://presh.com/hovinga Guy's Polyhedra Pages -
Vertex figures, filling, faceting diagrams, stellation, defining polytopes through generators, trimethoric and trisynaptic polyhedra, space-filling polyhedra, lost stellations of the icosahedron, and links.
http://www.queenhill.demon.co.uk/polyhedra/ Zome Edu -
Educational toys used to teach geometry and model building to create squares, spheres, stars and other regular shapes with sticks and connecting pieces. Products include kits and lesson plans.
http://www.zometool.com/educators.html Numericana - Polyhedra & Polytopes -
Enumeration, cartesian coordinates of vertices, naming, and counting the shapes.
http://home.att.net/~numericana/answer/polyhedra.htm Regular Polytopes -
Derivation of volume equations for regular polygons, polyhedra, and polytopes, with images.
http://www.math.rutgers.edu/~erowland/polygons.html The Geometry Junkyard -
Comprehensive list of links to sites on geometric properties of the shapes.
http://www.ics.uci.edu/~eppstein/junkyard/polytope.html
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