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 ∠ 6 and ∠ 3.
From the diagram, we can see that the angles ∠ 3 and ∠ 6 both are interior. Moreover, they lie on the opposite side of the transversal. They must be alternate interior angles.
