Question

name the two pairs of vertical angles in the figure.
∠1 and ?
∠2 and ?

Explanation:

Step1: Recall vertical angles definition

Vertical angles are opposite angles formed by two intersecting lines. They are equal in measure.

Step2: Identify vertical angle pairs

In the figure with two intersecting lines, the angles opposite to \( \angle 1 \) is \( \angle 3 \), and the angle opposite to \( \angle 2 \) is \( \angle 4 \). So \( \angle 1 \) and \( \angle 3 \) are vertical angles, \( \angle 2 \) and \( \angle 4 \) are vertical angles.

Answer:

\( \angle 1 \) and \( \angle 3 \); \( \angle 2 \) and \( \angle 4 \)