SSS, SAS, ASA, & AAS Triangle Congruence

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Taught by MrRutter
  • Currently 4.0/5 Stars.
21706 views | 3 ratings
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Meets NCTM Standards:
Lesson Summary:

In this lesson, you will learn about the four ways to check for triangle congruence: side side side, side angle side, angle side angle, and angle angle side. The video shows you how to identify and label information given in a triangle, then use that information to prove that two triangles are congruent. By understanding these four methods, you will be able to confidently solve any proof involving triangle congruence.

Lesson Description:

Learn about the four ways to check for triangle congruence.

Additional Resources:
Questions answered by this video:
  • What are SSS, SAS, ASA, and AAS in Geometry?
  • How do you prove that two triangles are congruent?
  • What is the difference between AAS and ASA?
  • How do you write a two-column proof of triangle congruence?
  • Given that S is the midpoint of QT and QR is parallel to TU, how do you prove that triangle QSR is congruent to triangle TSU?
  • What does it mean when two parallel lines are cut by a transversal?
  • What is true about alternate interior angles?
  • How do you start a triangle congruence proof?
  • What is the first statement in a congruence proof?
  • What do you write under the reason column in a two-column proof?
  • Staff Review

    • Currently 3.0/5 Stars.
    This is a great review lesson for anyone struggling with proving triangle congruence. Not only do you see how to write a two-column proof for a specific example of two triangles, but you will learn all the reasoning behind the statements and why it works.