按条件把图画出来,你可以看到正方形里面的两个小直角三角形,abx 和bcy, 其中bx=cy,ab=bc,所以ax=by.
按条件把图画出来,你可以看到正方形里面的两个小直角三角形,abx 和bcy, 其中bx=cy,ab=bc,所以ax=by.
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