如图，口ABCD中，点E在边AD上，以BE为折痕，将△ABE向上翻折，点A正

如图，口ABCD中，点E在边AD上，以BE为折痕，将△ABE向上翻折，点A正好落在CD上的点F，若△FDE的周长为8，△FCB的周长为22，则FC的长为_

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解析:略

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如图，口ABCD中，点E在边AD上，以BE为折痕，将△ABE向上翻折，点A正

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