Search
Google ClassroomGoogle Classroom
GeoGebraGeoGebra Classroom

Outline

  1. Circle Angle Theorems
    1. Same Arc Inscribed Angles
    2. Semi-Circle Inscribed Angle
    3. Central angle twice inscribed angle
    4. Tangent and Radius
    5. Intersecting Tangents
    6. Cyclic Quadrilateral

Circle Angle Theorems

Author:Martin McMulkin
Topic:Circle
Use these interactive sketched to explore some of the theorems

  • Same Arc Inscribed Angles

  • Semi-Circle Inscribed Angle

  • Central angle twice inscribed angle

  • Tangent and Radius

  • Intersecting Tangents

  • Cyclic Quadrilateral

Next
Same Arc Inscribed Angles

New Resources

  • Viviani's Curve
  • Trefoil Knot
  • Fourier Lissajous (Mechanical)
  • Slope Between 2 Points (Phase 2)
  • အခြေခံ data အခေါ်အဝေါ်များ

Discover Resources

  • Jellyfish
  • Circle Geometry - Angle @ Centre
  • Frustum | 平截頭體
  • practive
  • Cubic Graphs Y9N1

Discover Topics

  • Similar Triangles
  • Random Experiments
  • Tree Diagrams
  • Arithmetic
  • Angles
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®