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

Explanation:

Step1: Recall the definition of vertical angles

Vertical angles are the angles opposite each other when two lines cross.

Step2: Identify vertical angles for ∠1

Looking at the figure, ∠1 and ∠3 are opposite each other when the two lines intersect.

Step3: Identify vertical angles for ∠2

Looking at the figure, ∠2 and ∠4 are opposite each other when the two lines intersect.

Answer:

∠1 and ∠3; ∠2 and ∠4