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如图,把长方形纸片ABCD沿EF折叠,使点B落在边AD上的点B'处,点A落在点A'处;(1)求证:B'E=BF;(2)设AE=a,AB=b,BF=c,试猜想a,b,c之间的满足何种等量关系,并证明你...
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教案备课库《八(2)数学作业14.2.2勾股定理的应用》真题及答案
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