Question

which angle number represents an angle vertical to ∠jrm?

Explanation:

Step1: Recall vertical - angle definition

Vertical angles are formed when two lines intersect. They are opposite each other and have equal measures.

Step2: Identify intersecting lines

Lines $LK$ and $NP$ intersect at point $S$. $\angle JRM$ and $\angle 4$ are vertical angles as they are formed by the intersection of the relevant lines and are opposite each other.

Answer:

$\angle 4$