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

Lesson Playlist

06:53
02:42
+2

02:57

Lesson Worksheet

Q1:

Determine the lengths of and .

Q2:

Find the lengths of and .

Q3:

The two triangles in the given figure share the measures of two angles and the length of one side. Does a rigid transformation exist that would map triangle to triangle , and, hence, are the two triangles congruent?