Circle Geometry 2

pgiesin


  • 1. Circle Theorem 1 - Angle at the Centre
  • 2. Circle Theorem 2 - Angles in a Semicircle
  • 3. Circle Theorem 3 - Angles in the Same Segment
  • 4. Circle Theorem 4 - Cyclic Quadrilateral
  • 5. Circle Theorem 5 - Radius to a Tangent
  • 6. Circle Theorem 6 - Tangents from a Point to a Circle
  • 7. Circle Theorem 7 - Chords of a Circle
  • 8. Theorem 8 - Exterior angle of a cyclic quadrilateral

1.

Circle Theorem 1 - Angle at the Centre

Move the points on the circumference of the circle. What do you notice about the angles in the circle?[br][br]Note: Due to GeoGebra's rounding this model only holds true when the angle at the centre is set to an even number.
Circle Theorem 1 - Angle at the Centre
– MrDoyle

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