Question

which angle number represents an angle vertical to ∠lrk?

Explanation:

Step1: Recall vertical - angle definition

Vertical angles are formed when two lines intersect. They are opposite each other and are congruent.

Step2: Identify intersecting lines

Lines $LK$ and $NP$ intersect at point $R$.

Step3: Find the vertical angle

The angle vertical to $\angle LRK$ is $\angle NRP$ which is labeled as angle $4$.

Answer:

$4$