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Chapter 11 Rotational Symmetry of Icosahedron

Author:Roger Gemberling, Anthony OR 柯志明
Drag the red points to investigate the rotational symmetry of the icosahedron.

New Resources

  • bewijs stelling van Pythagoras
  • Cup Modeling Project (V2): Building Surfaces of Revolution
  • Pythagoras fractal tree: Step 2
  • Derivative and Differential - A Geometric Point of View
  • Ellipse and Equation

Discover Resources

  • Triangle Angle Sum Theorem
  • Co ordinate geometry
  • Tutorial File
  • Rotating a Triangle around an Axis
  • Problems with the implicit function

Discover Topics

  • Correlation
  • Secant Line or Secant
  • Reflection
  • Trapezoid
  • Combinatorics
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