# SSS, SAS, ASA, & AAS Triangle Congruence

Taught by MrRutter
• Currently 4.0/5 Stars.
21706 views | 3 ratings
Part of video series
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.

• 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.