hey yall im confused for number 4 i put given but my teacher said correct 4 mark what you know so you can know what postulate to use ....can someone explain.(i will mark you as the branlest wtv)

Answer:
Step-by-step explanation:
3) LN≅ LN Reflexive property
4) ΔONL ≅ΔMLN Given
5) LM ≅ NO CPCT - Corresponding parts of congruent triangles