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The measure of USV is ________ degrees.The solution is _________________

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Since ∠VST measures 90°, the measure of ∠RSV must also be 90° because the two angles are linear pair.

Since m∠RSU=51°, then the measure of ∠USV is as follows:


\begin{gathered} m\angle USV=m\angle RSV-m\angle RSU \\ m\angle USV=90\degree-51\degree \\ m\angle USV=39\degree \end{gathered}

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