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As done above if we divide the circle in 64 sectors, and arrange these sectors. It gives nearly a rectangle (Fig 11.37).un cicikFig 11.37What is the breadth of this rectangle? The breadth of this rectangle is the radius of thecircle, i.e., 'r'.As the whole circle is divided into 64 sectors and on each side we have 32 sectors, thelength of the rectangle is the length of the 32 sectors, which is half of the circumference(Fig 11.37)Area of the circle = Area of rectangle thus formed = 1xb- (Half of circumference) x radius1- x2ar2xr=trSo, the area of the circle = ir |
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Answer» As DONE above if we divide the circle in 64 sectors, and arrange these sectors. Itgives nearly a rectangle (Fig 11.37).un cicikFig 11.37What is the BREADTH of this rectangle? The breadth of this rectangle is the radius of thecircle, i.e., 'r'.As the whole circle is divided into 64 sectors and on each side we have 32 sectors, THELENGTH of the rectangle is the length of the 32 sectors, which is half of the circumference(Fig 11.37)Area of the circle = Area of rectangle thus formed = 1xb- (Half of circumference) X radius1- x2ar2xr=trSo, the area of the circle = IR |
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