5.5 Parallel – TheWorksheets.CoM

5.5 Parallel Lines and Transversals - Big Ideas Learning

Section 5.5 Parallel Lines and Transversals 215 EXAMPLE 2 Using Corresponding Angles Use the ﬁ gure to ﬁ nd the measures of the numbered angles. ∠1: ∠1 and the 75° angle are vertical angles. They are congruent. So, the measure of ∠1 is 75°. ∠2 and ∠3: The 75° angle is supplementary to both ∠2 and ∠3. 752 =° 180 + ∠° Deﬁ nition of supplementary angles