The length of a chain used as the boundary of a semi circular park is 90 mtrs find the area of the park.

Dear student
Boundary of semicircular park=90mπr+2r=90r227+2=90r=90×736mArea of park=12πr2=12×227×90×736×90×736=481.25m2
Regards

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Pi r + 2r =90
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