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

Proof of the angle sum of a triangle.

Author:Lesley Skipper
Topic:Angles
A proof that the angles in a triangle add to 180 degrees.

New Resources

  • 兩位數的位值
  • bewijs stelling van Pythagoras
  • apec
  • Linear Systems + Relationships Between Coefficients and Solutions
  • Nikmati Keunggulan Di Bandar Judi Terpercaya

Discover Resources

  • Start, Perpendicular to point on line
  • another draft.
  • NigrovicB_construction.ggb
  • Modul15D_Vina Lusiana_SMAI NFBS Lembang
  • Solving Systems of Linear Equations Graphically

Discover Topics

  • Boxplot
  • Median Line
  • Fractions
  • Histogram
  • Addition
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®