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The arc lenght of pi over 3 and 10m

User Ifoma
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\bf \textit{arc's length}\\\\ s=r\theta ~~ \begin{cases} r=radius\\ \theta =angle~in\\ \qquad radians\\ ------\\ r=10\\ \theta =(\pi )/(3) \end{cases}\implies s=10\cdot \cfrac{\pi }{3}\implies s=\cfrac{10\pi }{3}
User Florent Georges
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