Question

which angle is vertical to ∠1? ∠3 ∠4 ∠6 ∠5

Explanation:

Step1: Recall vertical - angle definition

Vertical angles are formed when two lines intersect. They are non - adjacent angles opposite each other.

Step2: Identify vertical angle to ∠1

When two lines intersect to form the given angles, ∠1 and ∠3 are non - adjacent and opposite each other.

Answer:

∠3