Search
Google ClassroomGoogle Classroom
GeoGebraGeoGebra Classroom

Outline

  1. Adding the Angles in a Triangle: IM 8.1.15
    1. Lesson 8.1.15
    2. Practice 8.1.15

    Adding the Angles in a Triangle: IM 8.1.15

    Author:GeoGebra Classroom Activities
    Topic:Angles, Geometry, Triangles
    “Adding the Angles in a Triangle” from IM Grade 8 by Open Up Resources and Illustrative Mathematics. Licensed under the Creative Commons Attribution 4.0 license.
    Adding the Angles in a Triangle: IM 8.1.15

    Table of Contents

    • Lesson 8.1.15

      • IM 8.1.15 Lesson: Adding the Angles in a Triangle
    • Practice 8.1.15

      • IM 8.1.15 Practice: Adding the Angles in a Triangle
    Next
    IM 8.1.15 Lesson: Adding the Angles in a Triangle

    New Resources

    • Reflection = 180° Rotation about a Line
    • רישום חופשי
    • အခြေခံ data အခေါ်အဝေါ်များ
    • Making New Year's resolutions for 2026
    • Prism Drawn in 1-Point Perspective

    Discover Resources

    • Case1.2
    • Fixed Parallel Lines 1.11 In Class Experiment
    • introduce longitude and Latitude
    • Пример на ФСУ

    Discover Topics

    • Random Experiments
    • Function Graph
    • Hyperbola
    • Real Numbers
    • Solids or 3D Shapes
    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®