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The diameter of a semicircle is 16 miles. What is the semicircle's perimeter? d=16 mi Use 3. 14 for ​. Please help.

The diameter of a semicircle is 16 miles. What is the semicircle's perimeter? d=16 mi Use 3. 14 for ​. Please help.
asked 177k views
25 votes
The diameter of a semicircle is 16 miles. What is the semicircle's perimeter?

d=16 mi

Use 3. 14 for ​.


Please help.

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User StarGeek
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1 Answer

9 votes


\textit{circumference of a semi-circle}\\\\ C=\pi r~~ \begin{cases} \stackrel{\textit{half diameter}}{r=radius}\\[-0.5em] \hrulefill\\ r=8 \end{cases}\implies C=\pi (8)\implies \stackrel{using~\pi =3.14}{C=25.12}

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User Richelly Italo
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8.1k points
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