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

    • Perimeter of a Rectangle with Unknown Sides
    • bewijs stelling van Pythagoras
    • Parallel lines, Transversals and Segments
    • Rolling a Square
    • General Polar Equation of Conics with Rotation (2)

    Discover Resources

    • Article + LP
    • مثلث متساوي الساقين
    • Optimization - Pizza Box
    • traces of... differences
    • Useful information

    Discover Topics

    • Special Points
    • Combinatorics
    • Numbers
    • Correlation
    • Plane Figures or 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®