一道初四数学题(只能用相似的知识解答)如图,在△ABC中,AB=AC,∠B=30°,BC=8,D在边BC上,E在线段DC上,DE=4,△DEF是等边三角形,边DF交边AB于点M,边EF交边AC于点N.(1)求证:△BMD∽△CNE;(2)当BD为
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![一道初四数学题(只能用相似的知识解答)如图,在△ABC中,AB=AC,∠B=30°,BC=8,D在边BC上,E在线段DC上,DE=4,△DEF是等边三角形,边DF交边AB于点M,边EF交边AC于点N.(1)求证:△BMD∽△CNE;(2)当BD为](/uploads/image/z/13298903-71-3.jpg?t=%E4%B8%80%E9%81%93%E5%88%9D%E5%9B%9B%E6%95%B0%E5%AD%A6%E9%A2%98%EF%BC%88%E5%8F%AA%E8%83%BD%E7%94%A8%E7%9B%B8%E4%BC%BC%E7%9A%84%E7%9F%A5%E8%AF%86%E8%A7%A3%E7%AD%94%EF%BC%89%E5%A6%82%E5%9B%BE%2C%E5%9C%A8%E2%96%B3ABC%E4%B8%AD%2CAB%3DAC%2C%E2%88%A0B%3D30%C2%B0%2CBC%3D8%2CD%E5%9C%A8%E8%BE%B9BC%E4%B8%8A%2CE%E5%9C%A8%E7%BA%BF%E6%AE%B5DC%E4%B8%8A%2CDE%3D4%2C%E2%96%B3DEF%E6%98%AF%E7%AD%89%E8%BE%B9%E4%B8%89%E8%A7%92%E5%BD%A2%2C%E8%BE%B9DF%E4%BA%A4%E8%BE%B9AB%E4%BA%8E%E7%82%B9M%2C%E8%BE%B9EF%E4%BA%A4%E8%BE%B9AC%E4%BA%8E%E7%82%B9N%EF%BC%8E%EF%BC%881%EF%BC%89%E6%B1%82%E8%AF%81%EF%BC%9A%E2%96%B3BMD%E2%88%BD%E2%96%B3CNE%EF%BC%9B%EF%BC%882%EF%BC%89%E5%BD%93BD%E4%B8%BA)
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