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19 September, 13:37

Find the area of a regular pentagon with radius 9mm

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  1. 19 September, 14:03
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    The area is calculated by using the formula A = (r^2) * n*sin (360/n) / 2 where n is the number of sides which is 5 for pentagon and r is the radius which is 9 mm. So, using the formula, the answer is 51.4 mm^2.
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