Question

which angles are vertical to ∠15? select all that apply.

Explanation:

Step1: Recall vertical - angles definition

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

Step2: Identify vertical angles to ∠15

Looking at the intersection where ∠15 is located, the angle opposite to ∠15 is ∠13.

Answer:

∠13