Regular hexagon inscribed in a circle of given radius: its area

1. A.
   $1145\ \text{cm}^2$
2. B.
   $1845\ \text{cm}^2$
3. C.
   $165\ \text{cm}^2$
4. D.
   $172\ \text{cm}^2$

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1. A.
   $438.54\ \text{cm}^2$
2. B.
   $509.21\ \text{cm}^2$
3. C.
   $598.45\ \text{cm}^2$
4. D.
   $638.76\ \text{cm}^2$

Tap an option to check your answer.