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GeoGebra
  • Circle Theorems
  • Theorem 1 Chord/radius
  • Theorem 2 Angle subtended by a chord at centre and circumference
  • Theorem 3 Angles subtended by the same chord (bowtie)
  • Theorem 5 Exterior angle of a cyclic quad
  • Theorem 4 opposite angles of a cyclic quadrilateral
  • Theorem 6 Tangent/radius
  • Theorem 7 Two tangents from common point
  • Theorem 8 Tangent/chord

Circle Theorems

Author:
PCARTS
Topic:
Circle, Geometry
A summary of the 7 basic circle theorems.
Circle Theorems

Table of Contents

  • Theorem 1 Chord/radius

    • Theorem 1
  • Theorem 2 Angle subtended by a chord at centre and circumference

    • Theorem 2
  • Theorem 3 Angles subtended by the same chord (bowtie)

    • Theorem 3
  • Theorem 5 Exterior angle of a cyclic quad

    • Theorem 5
  • Theorem 4 opposite angles of a cyclic quadrilateral

    • Theorem 4
  • Theorem 6 Tangent/radius

    • Theorem 6
  • Theorem 7 Two tangents from common point

    • Theorem 7
  • Theorem 8 Tangent/chord

    • Theorem 8
Next
Theorem 1

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