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OpenStudy (anonymous):
HELP?? :( In the figure, p || q. You must prove that ∠4 is supplementary to ∠7. What is the reason for the highlighted statement in the proof?
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OpenStudy (anonymous):
OpenStudy (anonymous):
OpenStudy (anonymous):
Substitution Property of Equality For parallel lines cut by a transversal, corresponding angles are congruent. Congruent Supplements Theorem Vertical Angles Theorem
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