Question

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

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 angles ∠1, ∠2, ∠3, ∠4, ∠5, ∠6, the angle vertical to ∠1 is ∠3.

Answer:

∠3