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26 November, 19:54

Find the area of a regular pentagon with radius 9mm

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  1. 26 November, 22:30
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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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