Lesson: Congruence of Triangles: ASA and AAS Criteria

In this lesson, we will learn how to identify congruence in triangles using ASA and AAS criteria and find a missing angle or side length.

Sample Question Videos

Q1:

Determine whether the triangles in the given figure are congruent, and, if they are, state which of the congruence criteria proves this.

Q2:

Two triangles contain angles of equal measures.

Can we prove that the triangles are similar?

Can we prove that the two triangles are congruent?

Q3:

In the given figure, a reflection in the line would map triangle to triangle . Does it follow that the two triangles congruent?

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