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uppose that you needed to make a pen for some small animals. You have 12 of fencing.

uppose that you needed to make a pen for some small animals. You have 12 of fencing. You decide to make a circular pen, because if you wish to enclose an area using a given length of fencing, then a circular fence encloses a larger area than a fence of any other shape. what is the radius of the pen?

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