An arc subtends an angle of 30<sup>o</sup> at...
An arc subtends an angle of 30<sup>o</sup> at the centre of a circle radius 12cm. Calculate the length of the arc.
6πcm
2πcm
3πcm
9πcm
Correct answer is B
Length or arc = θ360 x 2πr
= 30360 x 2 x 227 x 12
= 112 x 2 x π x 2 = 2πcm
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