Triangles congruent by ASA and AAS proofs  Congruence
Triangles congruent by ASA and AAS proofs
Lessons

Intro Lesson

1.
What is the third congruence that is needed to prove that $\triangle ABC$$\cong$$\triangle DEF$ using the given postulate or theorem?

2.
Decide if the following triangles are congruent. Show your reasoning.