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如图,在Rt△ABC中,∠ACB=90°,AC=2,以点C为圆心,CB的长为半径画弧,与AB边交于点D,将绕点D旋转180°后点B与点A恰好重合,则图中阴影部分的面积为( )
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教案备课库《2017-2018学年云南省昆明市盘龙区九年级(上)期末数学试卷》真题及答案
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