Given: M ≅ X
N ≅ Y
YO ≅ NZ
Prove: △MNO ≅ △XYZ

Answer:
Δ MNO ≅ ΔXYZ ⇒ proved down
Step-by-step explanation:
Cases of congruency
Let us solve the question using the 4th rule above
∵ YZ = YO + OZ
∵ NO = NZ + ZO
∵ OZ = ZO ⇒ from the figure
∵ YO ≅ NZ ⇒ given
∴ YZ ≅ NO
In Δs MNO and XYZ
∵ ∠M ≅ ∠X ⇒ given
∵ ∠N ≅ ∠Y ⇒ given
∵ NO ≅ YZ ⇒ proved
→ By using the AAS postulate of congruency.
∴ Δ MNO ≅ ΔXYZ