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(2004•沈阳)沈阳市某中学举办校园文化艺术节,小颖设计了同学们喜欢的图案《我...
(2004•沈阳)沈阳市某中学举办校园文化艺术节,小颖设计了同学们喜欢的图案《我的宝贝》.图案的一部分是以斜边长为12cm的等腰直角三角形的各边为直径作半圆(如图),则图中阴影部分的面积为( )
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A.36πcm
2B.72πcm
2C.36cm
2D.72cm
2
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