pearl1128 pearl1128

31-03-2017
Mathematics

contestada

What is the area of a 20-gon with radius 5 in

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wolf1728 wolf1728

02-04-2017

Assuming that is the circumradius:
Polygon Area = [r^2 * n * sin (360 / n)] / 2
Polygon Area = (25 * 20 * sin (18)) / 2
Polygon Area = (500 * 0.30902) / 2
Polygon Area = 77.255

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