A) \[\pi ({{h}^{2}}+{{k}^{2}}-{{a}^{2}})\]
B) \[\pi {{a}^{2}}hk\]
C) \[\pi {{a}^{2}}\]
D) None of these
Correct Answer: C
Solution :
Since area\[=\pi {{r}^{2}}\], where \[r=a\] Þ Area\[=\pi {{a}^{2}}\].
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