Question

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

Looking at the intersection of the lines, ∠1 and ∠4 are opposite each other.

Answer:

∠4