如图,在△ABC中,∠ ABC和∠ ACB的角平分线BF和CF相交于点F,DF‖AB,EF‖AC,分别交BC边于点、E(1) 试说明:BD=DE(2)如果BC=14cm,求△DEF的周长
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![如图,在△ABC中,∠ ABC和∠ ACB的角平分线BF和CF相交于点F,DF‖AB,EF‖AC,分别交BC边于点、E(1) 试说明:BD=DE(2)如果BC=14cm,求△DEF的周长](/uploads/image/z/3779955-27-5.jpg?t=%E5%A6%82%E5%9B%BE%2C%E5%9C%A8%E2%96%B3ABC%E4%B8%AD%2C%E2%88%A0+ABC%E5%92%8C%E2%88%A0+ACB%E7%9A%84%E8%A7%92%E5%B9%B3%E5%88%86%E7%BA%BFBF%E5%92%8CCF%E7%9B%B8%E4%BA%A4%E4%BA%8E%E7%82%B9F%2CDF%E2%80%96AB%2CEF%E2%80%96AC%2C%E5%88%86%E5%88%AB%E4%BA%A4BC%E8%BE%B9%E4%BA%8E%E7%82%B9%E3%80%81E%EF%BC%881%EF%BC%89+%E8%AF%95%E8%AF%B4%E6%98%8E%EF%BC%9ABD%3DDE%EF%BC%882%EF%BC%89%E5%A6%82%E6%9E%9CBC%3D14cm%2C%E6%B1%82%E2%96%B3DEF%E7%9A%84%E5%91%A8%E9%95%BF)
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