Find the length of arc of the circle of radius 21 cm subtending an angle of 60° at the centre
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Answer:
22cm
Step-by-step explanation:
perimeter of circle is 2*pi*r = 2*22/7*21 = 132
in a circle angle is 360 in which 60 is 1/6th
hence length of the arc is 1/6th of perimeter which is 22cm
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