Question 253024
There's half a circle of radius 21 ft.
1/4 of a circle rad = 3 ft
1/4 of a circle rad = 11 ft
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Area = pi*(21^2/2 + 3^2/4 + 11^2/4)
= (pi/4)*(442 + 9 + 121)
= (pi/4)*572
= 143pi
=~ 449.25 sq feet
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