Question

which angle number represents an angle adjacent to ∠mrj?

Explanation:

Step1: Recall adjacent - angle definition

Adjacent angles share a common side and a common vertex and have no interior points in common.

Step2: Identify adjacent angle to ∠MRJ

For ∠MRJ, the adjacent angle is ∠JRK as they share the common side $\overrightarrow{RJ}$ and the common vertex R. In the number - labeled angles, ∠3 is ∠JRK.

Answer:

3