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Australian AMC 2013 - Intermediate Question 16

AMC AUSTRALIA · Australian AMC 2013 - Intermediate

Question 16

The shaded segment in the circle below, centre O, has an area of $1\text{ cm}^2$. The radius of the circle, in centimetres, is

Question illustration
  1. $\sqrt{\frac4\pi}$
  2. $\frac8\pi$
  3. $\sqrt{\frac4{\pi-2}}$
  4. $\frac4\pi$
  5. $2\sqrt\pi$