Answer: PNM and MNP
Explanation:
I'm going to assume that the marked angle is the one with the red triangle. We name angles using 3 letters, for example angle ABC. The middle letter should always be the vertex or tip of the angle, but the order of the first and third letter can be switched. For example, angle ABC is the same as angle CBA, but angle ABC and angle ACB are not the same angle.
In this case, our vertex is N, and our angle ends are P and M. As previously stated, the vertex must be in the middle, so our angle will be named _N_. However, P and M can be switched and it is still the same angle. This means that 2 ways to name the angle are angle PNM and angle MNP.