Question

which angle forms a corresponding pair with angle 1?

Explanation:

Step1: Recall corresponding - angle definition

Corresponding angles are in the same relative position at each intersection where a straight - line crosses two others. When two parallel lines are cut by a transversal, corresponding angles are congruent.

Step2: Identify the corresponding angle to ∠1

In the given figure, when two parallel lines are cut by a transversal, angle 1 and angle 3 are in the same relative position (both are above the parallel lines and on the same side of the transversal).

Answer:

3