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Calculate the length of the arc of a circle of radius 31.0 cm which subtends an angle or \(\frac{\pi}{6}\) at the centre. |
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Answer» Angle, θ = \(\frac{l}{r}\)radian From questions, θ = \(\frac{\pi}{6}=\frac{l}{31}\) ⇒ length, l = 31 × \(\frac{\pi}{6}\) cm = \(\frac{31\times3.14}{6}\) = 16.22 cm ≈ 16.2 cm |
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