Question

which angle is vertical to ∠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 ∠5

When two lines intersect to form ∠5, the non - adjacent angle opposite to ∠5 is ∠1.

Answer:

∠1