Part 2: use congruency theorems to prove congruency.

the congruency of mno and xyz can be proven using a reflection across the line bisecting . however, this congruency can also be proven using geometric postulates, theorems, and definitions. prove that the triangles are congruent using a two-column proof and triangle congruency theorems.

given: m x

n y

prove: mno xyz

xzymno