Geometry of Polytopes

• Polychora
• Polyhedra
• Software

• The Geometry Junkyard: Polyhedra and Polytopes  - Provides pointers on geometric properties of polygons, polyhedra, and higher dimensional polytopes (particularly convex polytopes).
• Guy's Polyhedra Pages  - Includes papers, current research and random resources on such topics as general theory of polytopes and polyhedra, stellation and faceting, and space-filling polyhedra.
• The Mathematical Atlas: Polytopes and Polyhedra  - Covers geometric objects made from straight pieces. Discusses applications and related fields, textbooks and references, and related websites.
• Regular Polygons  - Topics include geometric properties, diagonals, graphs, and Euler's formula, and supplements and links.