Answer:
∠N and ∠ONM
Step-by-step explanation:
In trigonometry, whenever Angles are usually labelled in the three letter notation, the middle term is the specified angle.
The angle ∠MNO is the angle between lines MN and NO.
In the options, using three letter notation, the only angle having N in the middle is ∠ONM.
Specifically, we can refer to the given angle using just a letter in the form: ∠N.
