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What is the exact circumference of a circle with a radius of 17mm (Answer options) 8.5

17
34
68

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\textit{circumference of a circle}\\\\ C=2\pi r ~~ \begin{cases} r=radius\\[-0.5em] \hrulefill\\ r=17 \end{cases}\implies C=2\pi (17)\implies C=34\pi

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