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In a circle of radius 21 cm, an arc subt...

In a circle of radius 21 cm, an arc subtends an angle of `60^(@)` at the centre. Find : (1) the length of the arc (2) area of the sector formed by the arc. (3) area of the segment formed by the corresponding chord

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The correct Answer is:
`(321-(441sqrt(3))/(4))cm^(2)`
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