Lesson: Congruence of Triangles: SSS, SAS, and RHS Mathematics • 8th Grade

In this lesson, we will learn how to prove that two triangles are congruent using either the side-side-side (SSS), the side-angle-side (SAS), or the right angle-hypotenuse-side (RHS) criterion.

Lesson Video

Lesson Playlist

01:52

Lesson Worksheet

Q1:

In the given figure, triangle and triangle have two equal sides and share one equal angle. Are triangles and congruent?

Q2:

Given that is the midpoint of in the given figure, without referencing angles, which congruence criteria could you use to prove triangles and are congruent?

Q3:

The figure shows triangles and .

Are the two triangles congruent?

Justify your answer with one of the following reasons.