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

Sum of Interior angle measures

Author:Sheryl Hughes

Prove the Sum

Construct a triangle. Compute the sum of the interior angles.

New Resources

  • Folding door
  • bewijs stelling van Pythagoras
  • Proving Triangles Similar by Dilation
  • Thales' Intercept Theorem
  • רישום חופשי

Discover Resources

  • Hoofdstuk 7
  • BasicFamilyTransformations
  • Area under the Curve
  • Types of triangles
  • Sine Law
  • Trig Identity (3) - Geometric Investigation

Discover Topics

  • Poisson Distribution
  • LCM and GCD
  • Similarity Transformation or Similarity
  • Reflection
  • Polygons
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®