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5.5 Parallel Lines and Transversals
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
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resources by chapter - Big Ideas Math
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