Search
Google ClassroomGoogle Classroom
GeoGebraGeoGebra Classroom
GeoGebra
  • Home
  • Resources
  • Profile
  • Classroom
  • App Downloads

Investigation of the sum of angles in a triangle

Author:Jan Manders
Topic:Angles
Points A, B, C and sliders can be moved. Get an idea?

New Resources

  • Midpoint Theorem (V2): Integer Solutions
  • Writing and Graphing Proportional Relationships (k>0)
  • Congruent Sides & Angles in △s: Exploration
  • Perpendicular Lines: Quick Exploration
  • Odd Function Explorer

Discover Resources

  • Temporary demonstration for Money-Coutts process
  • Centroids
  • copying line segments
  • Constuct the orthogonal projection
  • parabola epsilon-delta

Discover Topics

  • Differential Calculus
  • Pythagoras or Pythagorean Theorem
  • Distributions
  • Circumcircle or Circumscribed Circle
  • Linear Functions
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®