Mathematics

Geometry

Triangles

  • Heron's Triangle Area Formula Proof
  • NOVA: Pythagorean Theorem
  • Triangle Area Using Sin
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    • Conics

  • Conic Section Calculator
  • Graphing Any Conic
  • Graphing Circles
  • Graphing Ellipses
  • Graphing Hyperbolas
  • Graphing Parabolas
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    • Polyhedra

  • Annenberg Teachers' Lab: Shape & Space in Geometry
  • Area of Polygons
  • Gallery of Interactive Geometry
  • Pavilion of Polyhedreality
  • Plane Math
  • Polygon Properties
  • Rotations About the Origin
  • Transformations
  • Uniform Polyhedra
  • Virtual Polyhedra
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    • Patterns

  • IllusionWorks
  • Pattern
  • Patterns in Mathematics
  • Polynomiography
  • ProtoZone
  • Sandlot Science Optical Illusions
  • Snow Crystals
  • World of Escher
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    • Fractals

  • Fractals
  • Fractal Landscapes
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    • Cartography

  • Cartography
  • Four Color Theorem
  • Math of Cartography
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    • Origami

  • Origami Links and Pages
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    • Resources

  • Geometric Figures: Rectangle Perimeter and Area
  • Geometry Formula Sheet
  • Math Forum Geometry
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