A) \[\left( \frac{\pi -2}{2} \right){{r}^{2}}\]
B) \[\left( \frac{\pi +2}{2} \right){{r}^{2}}\]
C) \[\left( \frac{2\pi -3}{2} \right){{r}^{2}}\]
D) \[\left( \frac{3\pi -2}{2} \right){{r}^{2}}\]
E) None of these
Correct Answer: A
Solution :
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