Question 864131
How do you solve for the area if a regular polygon with a perimeter of 72ft and an interior angle of 170 degrees? 
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Find the # of sides
Ext angle = 180 - 170 = 10 degs
360/10 = 36 sides = n
side length = s = 72/36 = 2 ft
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{{{Area = ns^2*cot(360/n)/4}}}
= 36*cot(10) sq ft