A) \[2\pi r\]
B) \[\pi r\]
C) \[2r\]
D) \[r\]
Correct Answer: B
Solution :
| [b] Length of the arc of a semicircle |
| \[=\frac{1}{2}\times \]Circumference of a circle |
| \[=\frac{1}{2}\times 2\pi r=\pi r\] |
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