Search
Google Classroom
GeoGebraGeoGebra Classroom

Outline

  1. Triangles
    1. The Angles of a Triangle
    2. Triangles Proofs and Theorems
    3. Practice Problems

    Triangles

    Author:Judith Hilinski
    Topic:Triangles
    The Angles of a Triangle Proving that Triangles are Congruent
    Triangles

    Table of Contents

    • The Angles of a Triangle

      • Basic Definitions: Triangles
      • Triangles and Their Classification
      • Symbols and Examples-Angles in Triangles
    • Triangles Proofs and Theorems

      • Copy of triangle angle-sum theorem
      • Triangle Sum Theorem
    • Practice Problems

      • Practice Problems with Triangles
    Next
    Basic Definitions: Triangles

    New Resources

    • Difference engine Babbage vb 2
    • Limaçons
    • bewijs stelling van Pythagoras
    • Graphing 1 + cos(θ) in Polar Coordinates
    • גיליון אלקטרוני להעלאת נתוני בעיה ויצירת גרף בהתאם

    Discover Resources

    • Sector Area
    • daisy_pre
    • Transformations
    • Finding Equations of LSRL: Old School
    • All exterior angles = 360
    • sin, cos... 9

    Discover Topics

    • Special Points
    • Confidence Interval
    • Translation
    • Incircle or Inscribed Circle
    • Kite
    AboutPartnersHelp Centre
    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®