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如图,一块呈三角形的草坪上,一小孩将绳子一端栓住兔子,另一端套在木桩A处.若∠B...
如图,一块呈三角形的草坪上,一小孩将绳子一端栓住兔子,另一端套在木桩A处.若∠BAC=120°,绳子长3米(不包括两个栓处用的绳子),则兔子在草坪上活动的最大面积是( )
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A.π米
2B.2π米
2C.3π米
2D.9π米
2
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