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I need to know the length in miles of arc BDC?

I need to know the length in miles of arc BDC?-example-1
User Jooon
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Using the formula of the arc length, we have:


\begin{gathered} s=r\cdot\theta \\ s=4\cdot((5\pi)/(4))\text{ miles} \\ s=(20\pi)/(4)\text{ (Multiplying)} \\ s=5\pi\text{ (Dividing)} \\ \text{The answer is 5}\pi \end{gathered}

User Punund
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