- Polygons, Polyhedra, Polytopes
- Regular, rectified, and truncated polytopes with normal and hidden-detail-removed projections. Images, animations, and links. - 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.
- Numericana - Polyhedra & Polytopes - Enumeration, cartesian coordinates of vertices, naming, and counting the shapes.
- Pick's Theorem - Describes a theorem for finding an area of simple lattice polygons. Includes proof and Java applet simulation.
- Regular Polytopes - Derivation of volume equations for regular polygons, polyhedra, and polytopes, with images.
- The Geometry Junkyard - Comprehensive list of links to sites on geometric properties of the shapes.
- The Mathematical Atlas - Polytopes and Polyhedra - Collection of discussions regarding volume, vertices, dissection, g-holed tori, and other subjects.
- Zometool - Educational toys used to teach geometry and model building to create squares, spheres, stars and other regular shapes with sticks and connecting pieces.
