10. The correct answer is (C). You can determine the area of the semicircle in any
event—without either statement (1) or (2). So you need more information only to
determine the triangle’s area. Given statement (1) alone, the triangle could be any
shape, so its area could vary. Given statement (2) alone, AB and BC each could be any
length, and so the area of the triangle could vary. Thus, neither statement alone suffices
to answer the question. Given both statements together, the triangle must be
equilateral, and you can determine its area. (Although you don’t need to do the math,
the semicircle’s area is p
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