Use the AAS congruence rule to prove that the two given triangles are congruent.
The congruence of two of the corresponding angles is already given:
On the other hand, since O and Z lie in the segment YN, we know that:
And since YO=NZ (given), then:
Since two angles and one pair of corresponding sides are congruent, then, using the AAS correspondence rule, we can conclude that the triangles MNO and XYZ are congruent.