Circle theorems

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• Offline Activity (.zip)

• GeoGebra Files

  1. Circle Theorem 1: Angle at the Centre (.ggb)
     
  2. Circle Theorem 2: Angles in a semicircle (.ggb)
     
  3. Circle Theorem 3: Inscribed angles subtended by the same arc (.ggb)
     
  4. Circle Theorem 4: Cyclic quadrilateral (.ggb)
     
  5. Circle Theorem 5: Alternate Segment Theorem (.ggb)
     
  6. Circle Theorem 6: Tangent on a Circle (Tangent and Radius) (.ggb)
     
  7. Applet 7 (.ggb)
     
  8. Circle Theorem 8: Radius and Chord (.ggb)
     
  9. Applet 9 (.ggb)