Question

select the pair of angles which are vertical angles.
∠2 and ∠4
∠1 and ∠2
∠5 and ∠6
∠6 and ∠7

Explanation:

Vertical angles are formed when two lines intersect. They are opposite each other and are congruent. $\angle2$ and $\angle4$ are opposite each other when two lines intersect, making them vertical angles. $\angle1$ and $\angle2$ are adjacent angles, $\angle5$ and $\angle6$ are adjacent angles, and $\angle6$ and $\angle7$ are adjacent angles.

Answer:

$\angle2$ and $\angle4$