Asked by Prem

Find the area of a regular 36-sided polygon inscribed in a circle of radius 20.
Answered by oobleck
The area is 36 isosceles triangles, with central angle of 10°
So the height of each triangle is 20 cos5°
now finish it off.

or, use the formula A = 1/2 nr^2 sin(2π/n)
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