refer to the following figure
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area of sector - area of square= area of shaded region means
area of sector = 90/360*3.14*20*20and area of square is 20*20 now u can get cancellations and by above formulae u can substitute and solve self by doing self u can remember long period
area of sector = 90/360*3.14*20*20and area of square is 20*20 now u can get cancellations and by above formulae u can substitute and solve self by doing self u can remember long period
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