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如图,点E在正方形ABCD的边CD上,四边形DEFG也是正方形,已知AB=a,D...
如图,点E在正方形ABCD的边CD上,四边形DEFG也是正方形,已知AB=a,DE=b(a、b为常数,且a>b>0),则△ACF的面积( )
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A.只与a的大小有关
B.只与b的大小有关
C.只与CE的大小有关
D.无法确定
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