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Mathematics 18 Online
OpenStudy (anonymous):

If r // s, and m∠5 = 128°, what is m∠1? A. 59° B. 128° C. 64° D. 62°

OpenStudy (anonymous):

OpenStudy (miguel980):

B. 128 The Alternate Exterior Angles Theorem says that: "If a transversal intersects two parallel lines, then the alternate exterior angles are congruent."

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