An arc of a circle, radius 14cm, is 18.33cm long. Calculate to the nearest degree, the angle which the arc subtends at the centre of the circle. [T = $\frac{22}{7}$ ]

11^o

20^o

22^o

75^o

Correct answer is D

Length of an arc = $\frac{\theta}{360} \times 2\pi r$

18.33 = $\frac{\theta}{360} \times 2 \times \frac{22}{7} \times 14$

$\theta = \frac{18.33 \times 360 \times 17}{2 \times 22 \times 14}$

= 75^o (approx.)

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An arc of a circle, radius 14cm, is 18.33cm long. Calculate to the nearest degree, the angle which the arc subtends at the centre of the circle. [T = $\frac{22}{7}$ ]

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