The congruency of triangle MNO and XYZ can be proven using a reflection across the line bisecting line OZ. 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. Givin Angle N is congruent to angle X, angle N is congruent to angle Y, Line YL is congruent to NZ, prove triangle MNO is congruent to triangle XYZ.