GeoGebra
GeoGebra
  • Home
  • News Feed
  • Resources
  • Profile
  • People
  • Classroom
  • App Downloads
About GeoGebra
Contact us: office@geogebra.org
Terms of Service – Privacy – License

© 2023 GeoGebra®

Triangle Internal and External Angle Sum

Author:
Isaac Mannion
Created By Isaac Mannion Use the worksheet to explore the angle sum in triangles. The check boxes and slides show the angles in the triangle and the siders group the angles together. As an extension the external angle sum can be explored.

New Resources

  • Slope field explorer
  • Midpoint Coordinates: Check for Understanding
  • Perpendicular and Parallel Slopes
  • Point of View
  • Angles in Parallel Lines

Discover Resources

  • Travelling salesman
  • สุดยอดไปเร๊ย
  • การบวกจำนวนเต็ม
  • Pythagorean Triples
  • feixe paralelas

Discover Topics

  • Equations
  • Normal Distribution
  • Straight Lines
  • Trigonometric Functions
  • Translation

GeoGebra

  • About
  • Partners
  • GeoGebra on Tests
  • News Feed
  • App Downloads

Apps

  • Calculator Suite
  • Graphing Calculator
  • 3D Calculator
  • CAS Calculator
  • Scientific Calculator

Resources

  • Community Resources
  • Learn GeoGebra
  • Classroom
  • Geometry
  • Notes
  • Terms of Service Privacy License
  • Facebook Twitter YouTube