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levidenim08
levidenim08
26.08.2019 • 
Mathematics

Given that r || s and q is a transversal, we know that
∠3 ≅ ∠6 by the . therefore, m∠3 = m∠6 by the definition of congruent. we also know that, by definition, ∠4 and ∠3 are a linear pair, so they are supplementary by the linear pair postulate. by the definition of supplementary angles, m∠4 + m∠3 = 180°. using substitution, we can replace m∠3 with m∠6 to get m∠4 + m∠6 = 180°. therefore, by the definition of supplementary angles, ∠4 is supplementary to ∠6.
answer choices:
a) corresponding angles theorem
b) alternate interior angles theorem
c) vertical angles theorem
d) alternate exterior angles theorem

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