# geometry

P, Q, and S are collinear and the measure of PQR = 120°. What does the measure of SQT have to equal to ensure that R, Q, and T are collinear?

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1. Angles PQR and SQT are vertically opposite angles If RQT is to be a straight line (colinear).

So what should the measure of angle SQT be?

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posted by MathMate

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