Search
Google ClassroomGoogle Classroom
GeoGebraGeoGebra Lesson

Outline

  1. Circle Theorems
    1. Angle at the centre
    2. Angles in the same segment (animated)
    3. Cyclic quadrilateral
    4. Tangents to circle
    5. Radius and chord
    6. Alternate Segment Theorem

Circle Theorems

Author:Jonathan Longstaffe
Topic:Circle
The circle theorems

  • Angle at the centre

  • Angles in the same segment (animated)

  • Cyclic quadrilateral

  • Tangents to circle

  • Radius and chord

  • Alternate Segment Theorem

Next
Angle at the centre

New Resources

  • Segment Addition Postulate (Mild Questions)
  • Midpoint Theorem Questions: Mild
  • Right Triangle Inscribed in a Semicircle
  • Parabolas, Lines and Nomograms
  • Odd Function Explorer

Discover Resources

  • Randomly Nudged Array
  • Transformations: Rotations around the origin
  • Pickles
  • cos worksheet
  • Pythagorean Theorem Proof - Square

Discover Topics

  • Trapezoid
  • Centroid or Barycenter
  • Inequalities
  • Root
  • Parallelogram
AboutPartnersHelp Center
Terms of ServicePrivacyLicense
Graphing CalculatorCalculator SuiteMath Resources

Download our apps here:

Download_on_the_App_Store_Badge_US-UK_RGB_blk_4SVG_092917

© 2026 GeoGebra®