A) \[\frac{\theta }{360{}^\circ }\times 2\pi r\]
B) \[\frac{\theta }{360{}^\circ }\times \pi {{r}^{2}}\]
C) \[\frac{\theta }{360{}^\circ }\times \frac{\pi {{r}^{2}}}{2}\]
D) \[\frac{\theta }{360{}^\circ }\times \frac{\pi {{r}^{2}}}{4}\]
Correct Answer: A
Solution :
| [a] Length of an arc of a sector of a circle |
| \[=\frac{\theta }{360{}^\circ }\times 2\pi r.\] |
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