To determine what type of relationship the pair of highlighted angles has, we should consider the types of angles pairs that can be formed by a transversal. Let's examine the given angles ∠ 4 and ∠ 2.
From the diagram, we can see that the angles ∠ 4 and ∠ 2 lie on the same (right) side of the transversal. Moreover, ∠ 2 is interior, but ∠ 4 is exterior. They must be corresponding angles.
