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A sector of a circle of radius 9 cm subtends angle 120 at center of the circle find the area of the sector to the nearest cm 
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A sector of a circle with radius r cm contains an angle of θ radians between the bounding radii. Given that the perimeter of the sector is 7cm, express θ in terms of r and show that the area is r/2(72r)cm square. Hence, 
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