Search
Google ClassroomGoogle Classroom
GeoGebraGeoGebra Classroom

Outline

  1. Parallel Lines and Angles Problem
    1. Proving Theorems
    2. Applying Theorems

    Parallel Lines and Angles Problem

    Author:Aaron Dankman
    Topic:Angles
    Review, exercises, and a fun challenge related to some angle theorems
    Parallel Lines and Angles Problem

    Table of Contents

    • Proving Theorems

      • Defining Congruence
      • Proving Congruence
      • Proof: Vertical Angles Theorem
      • Proof: Corresponding Angles Theorem
      • Fun!
      • Prove Angle Congruence
    • Applying Theorems

      • Part 1: Observe and Conjecture
      • Part 2: Investigate
      • Part 3: Prove
    Next
    Defining Congruence

    New Resources

    • 巧算長方形周界
    • ANGLE
    • Nikmati Keunggulan Di Bandar Judi Terpercaya
    • Assistants (custom GPTs or Gemini Gems) for Math
    • Untitled

    Discover Resources

    • Parallel vectors investigation
    • Euclid I.26 part 1
    • Trapezoid Mid-Segment: 2 Discoveries
    • PREMIÈRE FIGURE MATHIS
    • Fractal

    Discover Topics

    • Indefinite Integral
    • Linear Functions
    • Symmetry
    • Probability
    • Scalene Triangles
    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®