Triangle Congruence Theorems: ASA or AAS?

On this triangle congruence lesson, you will learn the difference between the Angle-Angle-Side AAS theorem and the Angle-Side-Angle ASA theorem (also known as the asa postulate) when proving triangle congruence and what are same side interior angles?

This lesson answers the questions: How do I prove that two triangles are congruent? What is ASA? What is AAS? What is the difference between ASA and AAS?

Our lessons are perfect for flipped classroom math teachers and students. This lesson is aligned with the common core learning standards for math and the SAT math curriculum as well.

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