Search

Outline

  1. Circle Theorems
    1. Angle at the circumference versus the angle at the centre
    2. Angle at the circumference of a semi-circle
    3. Same Segment Theorem
    4. Cyclic Quadrilateral
    5. Alternate segment theorem
    6. Tangents and Radii

Circle Theorems

Author:Godfrey Almeida
Topic:Circle
Building on one circle theorem, how can you work out the majority of the others?

  • Angle at the circumference versus the angle at the centre

  • Angle at the circumference of a semi-circle

  • Same Segment Theorem

  • Cyclic Quadrilateral

  • Alternate segment theorem

  • Tangents and Radii

Next
Angle at the circumference versus the angle at the centre

New Resources

  • Modifiable Right Triangular Prism
  • Basic and Compound Inequality Illustrator
  • Writing and Graphing Proportional Relationships (k>0)
  • Rotating Custom Polygons Around an Axis
  • 繪畫垂直線

Discover Resources

  • Parabel (2.grads ligning)
  • Dugas: Lengths of Segments formed by Intersecting Secants
  • transformations
  • กราฟของสมการเชิงเส้นตัวแปรเดียว
  • Števila v trikotnikih, zlati rez...

Discover Topics

  • Logarithm
  • Isosceles Triangles
  • Fractions
  • Similar Triangles
  • Limits
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®