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the entire directory only in Geometry/Plane_Geometry Top: Science: Math: Geometry: Plane Geometry  (5) Tessellations@  (49) Sites: Occurrence of the Conics - Images of conics by Jill Britton. Polygons - Discusses the differences between the different types of these straight sided figures. Also, explains the difference between regular and irregular shapes. Pythagorean Theorem - A collection of 43 proofs - some interactive - of the Pythagorean theorem. Tim's Triangular Page - Explains the basic properties, formulas, theorems and different types of triangles. Includes proofs and illustrations. Xah: Visual Dictionary of Special Plane Curves - A Visual Dictionary of Special Plane Curves with graphics. Last update: 6:05 PT, Monday, July 2, 2007 Help build the largest human-edited directory on the web. Submit a Site - Open Directory Project - Become an Editor