In a circle of radius 21 cm, an arc subtends an angle of 60° at the centre. find: (i) the length of the arc (ii) area of the sector formed by the arc (iii) area of the segment formed by the corresponding chord.
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(i) the length of the arc
(ii) area of the sector formed by the arc, (iii) area of the segment formed by the corresponding chord.
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and also in which class u study
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