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Trapezoid $ABCD$ is inscribed in the semicircle with diameter $\overline{AB}$, as shown below. If $CD = 7$, $AD = 3$, and $BC = 3$, then find the radius of the semicircle.

 Sep 7, 2021
 #3
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Use this to find your answer

 

I set up two equations, each with r and theta then I solved them simultaneously.

I only needed r so you can eliminate theta.

 

 

 Sep 15, 2021

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