1. Lines and Angles
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Review the definitions of the types of angles pairs that can be formed by a transversal.
alternate interior angles
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.