Search
GeoGebra
  • Home
  • Resources
  • Profile
  • Classroom
  • App Downloads

Always an angle bisector

Author:Idan Tal

The applet illustrates that for any location of point D on the inner tangent circle, the cord AD is a bisector of the angle BAC.

New Resources

  • Writing and Graphing Proportional Relationships (k>0)
  • Basic and Compound Inequality Illustrator
  • Deriving the Arc Length Formula
  • Midpoint Theorem (V2): Integer Solutions
  • Calculating Arc Length, Radius, and Central Angle

Discover Resources

  • Qualitative Graph Donovan
  • Baseball Flight, and more (assuming no atmosphere)
  • Pedal Triangle
  • orthocenter
  • Naming the Moves: IM 8.1.2

Discover Topics

  • Matrices
  • Unit Circle
  • Translation
  • Polygons
  • Circumcircle or Circumscribed Circle
AboutPartnersHelp Centre
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®