Search
Google ClassroomGoogle Classroom
GeoGebraGeoGebra Classroom

Outline

  1. Triangle Theorems
    1. Triangle Sum Theorem
    2. Right Triangles
    3. Isosceles Triangles
    4. Triangle Inequality Theorem
    5. Exterior Angle Theorem

Triangle Theorems

Author:William Rodgers
This book includes several theorems that are important for understanding triangles. Use each applet to discover rules about a triangles angles and sides.

  • Triangle Sum Theorem

  • Right Triangles

  • Isosceles Triangles

  • Triangle Inequality Theorem

  • Exterior Angle Theorem

Next
Triangle Sum Theorem

New Resources

  • bewijs stelling van Pythagoras
  • Parallel Lines and Angles: Thinking Classroom Exploration
  • AI for worksheet development
  • Export grapfics view
  • Untitled

Discover Resources

  • Sine law-ambiguous case
  • anistop
  • Sine Cosine and Tangent
  • jkjkj
  • Trigonometric Ratios - Unit Circle Definitions
  • Pythagorean Theorem Proof

Discover Topics

  • Coordinates
  • Linear Functions
  • Secant Line or Secant
  • Circumcircle or Circumscribed Circle
  • Indefinite Integral
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®