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12 October, 17:39

Suppose that you needed to make a pen for some small animals. you have 12 m 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 r of the pen?

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  1. 12 October, 18:01
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    The 12 m of fencing s equal to the circumference of the circle.

    If the radius is r, then the circumference is

    2πr = 12

    r = 12 / (2π) = 6/π = 1.91 m

    Answer: r = 6/π m or 1.91 m (nearest hundredth)
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