geometry

Ισίδωρος Γλαβάς, 14.02.2015


  • 1. Area of Circles
  • 2. Geometric workshop for primary school
  • 3. Pythagorean Theorem Proof without Words
  • 4. Area of a Circle - Wedge/Sector Demonstration
  • 5. Rotating a Triangle Around a Coordinate Axis
  • 6. The golden section MMM
  • 7. Spiral
  • 8. Area of a Circle (by Peeling)
  • 9. Area of Circles
  • 10. Symmetries
  • 11. Pythagorean Theorem Proof
  • 12. Arc and Angle
  • 13. Equal angles in circle; various theorems
  • 14. What is a Radian?

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Area of Circles

What is the area of a circle? Explore with the following applet.
Anthony Or, GeoGebra Institute of Hong Kong.
– Anthony OR 柯志明

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