如图,在△ABC中,∠ABC、∠ACB的平分线相交于点O,过O作DE平行BC,分别交AB于点D、E.若△ODE的周长为12cm,求BC的长.如图,在△ABC中,∠ABC、∠ACB的平分线相交于点O,过O作DE平行BC,分别交AB于点D、E.
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![如图,在△ABC中,∠ABC、∠ACB的平分线相交于点O,过O作DE平行BC,分别交AB于点D、E.若△ODE的周长为12cm,求BC的长.如图,在△ABC中,∠ABC、∠ACB的平分线相交于点O,过O作DE平行BC,分别交AB于点D、E.](/uploads/image/z/1026166-22-6.jpg?t=%E5%A6%82%E5%9B%BE%2C%E5%9C%A8%E2%96%B3ABC%E4%B8%AD%2C%E2%88%A0ABC%E3%80%81%E2%88%A0ACB%E7%9A%84%E5%B9%B3%E5%88%86%E7%BA%BF%E7%9B%B8%E4%BA%A4%E4%BA%8E%E7%82%B9O%2C%E8%BF%87O%E4%BD%9CDE%E5%B9%B3%E8%A1%8CBC%2C%E5%88%86%E5%88%AB%E4%BA%A4AB%E4%BA%8E%E7%82%B9D%E3%80%81E.%E8%8B%A5%E2%96%B3ODE%E7%9A%84%E5%91%A8%E9%95%BF%E4%B8%BA12cm%2C%E6%B1%82BC%E7%9A%84%E9%95%BF.%E5%A6%82%E5%9B%BE%EF%BC%8C%E5%9C%A8%E2%96%B3ABC%E4%B8%AD%EF%BC%8C%E2%88%A0ABC%E3%80%81%E2%88%A0ACB%E7%9A%84%E5%B9%B3%E5%88%86%E7%BA%BF%E7%9B%B8%E4%BA%A4%E4%BA%8E%E7%82%B9O%EF%BC%8C%E8%BF%87O%E4%BD%9CDE%E5%B9%B3%E8%A1%8CBC%EF%BC%8C%E5%88%86%E5%88%AB%E4%BA%A4AB%E4%BA%8E%E7%82%B9D%E3%80%81E.)
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