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What is the measure of ZRST?

What is the measure of ZRST?-example-1
User Datt
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\huge\textsf{D.}\ \boxed{79^\circ}


\angle RST is an inscribed angle. This means that the measure of the angle is equal to half the measure of the intercepted arc.


\begin{aligned}m\angle RST&=(1)/(2)m\widehat{RT}\\&=(1)/(2)(158^\circ)\\&=\boxed{79^\circ}\end{aligned}

User Yakov
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