GMAT考题：Prep2007E1-PS-11

GMAT考题

In the figure above, the radius of the circle with center O is 1 and BC = 1. What is the area of triangular region ABC ?

~$\frac{\sqrt{2}}{2}$~

~$\frac{\sqrt{3}}{2}$~

~$\sqrt{2}$~

~$\sqrt{3}$~

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