'Interior angles Angles in the same relative position Angles between the two lines Example: UL upper left angle (top) coresponds to UL upper left angle (bottom) Parallel Lines Cut by a Transversal If two parallel lines are cut by a transversal, then If two parallel lines are cut by a transversal, then the corresponding angles are congruent. Find angle measures, prove conjectures, and use properties of parallel lines to solve problems In the same figure, the four pairs of corresponding angles are