Question

which angles are vertical to each other?

Explanation:

Step1: Recall vertical - angle definition

Vertical angles are formed when two lines intersect. They are opposite each other and are congruent.

Step2: Analyze the given angles

In the given figure, when two lines intersect, ∠1 and ∠3 are vertical angles, and ∠2 and ∠4 are vertical angles.

Answer:

∠2 and ∠4