Search
Google ClassroomGoogle Classroom
GeoGebraGeoGebra Lesson

Outline

  1. Proofs on Parallel Lines
    1. Vertical Angle Theorem
    2. Two-column proof (Corresponding Angles)
    3. Two-column Proof (Alt Int. Angles)
    4. Same-side Interior Angles Postulate
    5. Converse of Same Side Interior Angles Postulate
    6. Prove Converse of Alternate Interior Angles Theorem
    7. Converse of Corresponding Angles Theorem
    8. Proving Lines Parallel #1

Proofs on Parallel Lines

Author:Patricia Angela Santos, Jenny Secor
Topic:Angles

  • Vertical Angle Theorem

  • Two-column proof (Corresponding Angles)

  • Two-column Proof (Alt Int. Angles)

  • Same-side Interior Angles Postulate

  • Converse of Same Side Interior Angles Postulate

  • Prove Converse of Alternate Interior Angles Theorem

  • Converse of Corresponding Angles Theorem

  • Proving Lines Parallel #1

Next
Vertical Angle Theorem

New Resources

  • Graphing Basic and Compound Inequalities
  • Squaring a Rectangle (PST Version)
  • Marion's Theorem
  • Laundry Basket
  • Deciding How New Information Affects Probability

Discover Resources

  • Reflection-8
  • Unit 6 Turtle
  • Exit Ticket
  • Inscribed and circumscribed squares
  • brikker2

Discover Topics

  • Indefinite Integral
  • Kite
  • Straight Lines
  • Logarithm
  • Polynomial Functions
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®