Search
Google ClassroomGoogle Classroom
GeoGebraGeoGebra Classroom

Outline

  1. Lesson 9 - Angle Theorems of a Triangle
    1. Sum of the Angles in a Triangle
    2. Triangle Exterior Angle-Sum Theorem

Lesson 9 - Angle Theorems of a Triangle

Author:Mr. Coffie
This book contains GeoGebra pages that explore the theorems discussed in 10th grade geometry: the triangle angle-sum theorem and the triangle exterior angle-sum theorem.

  • Sum of the Angles in a Triangle

  • Triangle Exterior Angle-Sum Theorem

Next
Sum of the Angles in a Triangle

New Resources

  • 函數的奇偶性
  • רישום חופשי
  • montecarlo circles 5
  • גיליון אלקטרוני להעלאת נתוני בעיה ויצירת גרף בהתאם
  • Area Between Two Curves

Discover Resources

  • Quantitative Displays
  • Functions, Linear Equations and Proportional Figures
  • BlizOkrColor
  • Improper fractions and mixed numbers on a number line
  • Dodecahedron is a star

Discover Topics

  • Incircle or Inscribed Circle
  • Circumcircle or Circumscribed Circle
  • Correlation
  • Dilation
  • Vectors 2D (Two-Dimensional)
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

© 2025 GeoGebra®