State the part you would need to know is congruent in order to prove the triangle congruent by Leg-Leg.

Answer: These four criteria used to test triangle congruence include: Side – Side – Side (SSS), Side – Angle – Side (SAS), Angle – Side – Angle (ASA), and Angle – Angle – Side (AAS). There are more ways as well to prove the congruency of triangles, but in this lesson, we will restrict ourselves to these postulates only.
Step-by-step explanation: