7Use your protractor to measure the angles formed by the transversal and the parallel lines. Color congruent angles the same color.
8Fill in the blanks. What do you notice? 1 ______ 4 ______ 5 ______ 8 ______2 ______ 3 ______ 6 ______ 7 ______What do you notice?1 4 5 82 3 6 7
9Properties of Transversals to Parallel Lines If two parallel lines are intersected by a transversalThe acute angles that are formed are all congruentThe obtuse angles are all congruentAny acute angle is supplementary to any obtuse angle
10If the transversal is perpendicular to the parallel lines, all angles formed are congruent to 90o.