Vocabulary: Recall: Parallel lines are two lines that When created: are cut by a transversal, there are several relationships that are Alternate Interior Angles: Angles that are sides of the transversal. These angles are Alternate Exterior Angles: Angles that are sides of the transversal. These angles are intersect. Corresponding angles: Angles that are in " angles are always the parallel lines and are on alternate the parallel lines and are on alternate ". Pairs of corresponding When writing out the reasons to parallel line proofs, it is important to never forget the words "Parallel lines cut by a pairs of (alternate interior/alternate exterior/corresponding) angles are