Lesson: Congruence of Triangles: ASA and AAS Mathematics • 8th Grade

In this lesson, we will learn how to prove that two triangles are congruent using either the angle-side-angle (ASA) or the angle-angle-side (AAS) criterion and determine whether angle-side-side is a valid criterion for triangle congruence or not.

Lesson Video

Sample Question Videos

06:53
02:19
03:00

Lesson Worksheet

Q1:

Determine the lengths of and .

Q2:

Which congruence criteria can be used to prove that the two triangles in the given figure are congruent?

Q3:

Which congruence criteria can be used to prove that the two triangles in the given figure are congruent?