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题库 / Prep2007E1-PS-11
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 ?
~$\frac{\sqrt{2}}{2}$~
~$\frac{\sqrt{3}}{2}$~
1
~$\sqrt{2}$~
~$\sqrt{3}$~
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