which angle is vertical to ∠1?

which angle is vertical to ∠1?
Answer
Explanation:
Step1: Recall vertical - angle definition
Vertical angles are formed when two lines intersect. They are opposite each other.
Step2: Identify vertical angle to ∠1
In the given figure, when two lines intersect, the angle opposite to ∠1 is ∠3.
Answer:
3