Question

which angle is vertical to ∠3? ∠1 ∠4 ∠2 ∠5

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 vertical angle to ∠3

In the given figure, when two lines intersect, ∠3 and ∠1 are opposite each other. So, ∠1 is vertical to ∠3.

Answer:

∠1