ABCD represent a flower bed. if OA = 28m and OD = 21m , find
(a) the area of the bed,
(b) the perimeter of the bed.
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Answer:
Area of AOB= (πr*2)÷4
=(22÷7×28×28)÷4
=(2464)÷4
=616 square metres
Area of DOC=(πr*2)÷4
=(22÷7×21×21)÷4
=(1386)÷4
=346.5 square metres
Area of the bed(ABCD)=
Area of AOB–Area of DOC
=616–346.5
=269.5 square metres
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