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Mathematics 51 Online
OpenStudy (anonymous):

Alex is writing statements to prove that the sum of the measures of interior angles of triangle PQR is equal to 180o. Line m is parallel to line n. Which is a true statement he could write? Angle PRQ measures 40o. Angle PQR measures 60o. Angle PRQ measures 80o. Angle PQR measures 40o.

OpenStudy (anonymous):

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