1. Lesson 5-2 Parallel and Perpendicular Lines
Obj: I can identify parallel and perpendicular lines and the angles formed by a transversal HWK: p all Vocab: 1) parallel lines 2) perpendicular lines 3) transversal

2. Properties of Transversals to Parallel Lines
If two parallel lines are intersected by a transversal
Corresponding angles are congruent
Alternate interior angles are congruent
Alternate exterior angles are congruent
If the transversal is perpendicular to the parallel lines, all of the angles formed are congruent 90° angles

3. Ex 1) In the figure, line “a” ││ line “b”
Ex 1) In the figure, line “a” ││ line “b”. Find the measure of each angle. Justify your answer
m< 4
m< 3
m< 5 b c a 7
74° 1

4. m< 3 m< 1 m< 2 m< 4 m< 5 m< 6 m< 7
Ex 2) In the figure, line “n” ││ line “m”. Find all of the measures of the angles. Justify your answer.
m< 3
m< 1
m< 2
m< 4
m< 5
m< 6
m< 7
124° n m