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Top 20 Directory:
Top : Science : Math : Geometry : Plane_Geometry
  		• Tessellations@
    Sites:
  		• Lessons on Perimeter and Area of Polygons from Math Goodies: Discusses the perimeter of polygons, area of trapezoids, and challenge exercises. Available on CD only are the area of triangles and parallegrams, as well as practice exercises with solutions.
  		• 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.
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