Search
Google ClassroomGoogle Classroom
GeoGebraGeoGebra Classroom

Outline

  1. Circle Theorems
    1. Angle at the centre
    2. Angles in the same segment
    3. Angle in a semicircle
    4. Cyclic quadrilaterals
    5. Alternate Segment
    6. Chord bisector
    7. Tangent and radius
    8. Tangent lengths

Circle Theorems

Author:Ben Sparks
Topic:Circle
All 8 circle theorems discussed at GCSE maths. Interactive.

  • Angle at the centre

  • Angles in the same segment

  • Angle in a semicircle

  • Cyclic quadrilaterals

  • Alternate Segment

  • Chord bisector

  • Tangent and radius

  • Tangent lengths

Next
Angle at the centre

New Resources

  • Angle Bisector: Quick Warm Up Questions
  • Parallel Lines & Related Angles: Quick Reminders
  • bewijs stelling van Pythagoras
  • AI for Math Teachers (prompt examples)
  • Text with alpha background color

Discover Resources

  • Sierpenski Triangle 4.2
  • זויות קדקדיות
  • Copia de Concepte de derivada en un punt
  • Teorema Pythagoras 7 (drag n drop)
  • Batch 2 Topic 9 MS

Discover Topics

  • Addition
  • Definite Integral
  • Standard Deviation
  • Power Functions
  • Division
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®