Find the perimeter and area of the regular polygon;
The regular figure is an octagon with the radius of 20
If the radius is 20, then the apothem is 18.48
If the radius is 20 then the side length is 15.31; giving a perimeter of 122.46
A = 0.5 x P x a = 0.5 x 122.46 x 18.48 = 1131.52
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