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A chord AB of a circle, centre O, and radius 21 cm is 36 cm long. a) Express the angle AOB in radians. b)

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A chord AB of a circle, centre O, and radius 21 cm is 36 cm long. a) Express the angle AOB in radians. b) Use your result in (a) to calculate, correct to three significant figures, i) the length of the arc AB. ii) the area of the sector AOB. iii) the area of the minor segment cut off by the chord AB. (Take = 3.142.)

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