脑子短路数学题求救~如图,在△ABC中,DE//AC,∠B=∠DAC,BD=5CM,CD=4CM,求DE的长~
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![脑子短路数学题求救~如图,在△ABC中,DE//AC,∠B=∠DAC,BD=5CM,CD=4CM,求DE的长~](/uploads/image/z/1675215-63-5.jpg?t=%E8%84%91%E5%AD%90%E7%9F%AD%E8%B7%AF%E6%95%B0%E5%AD%A6%E9%A2%98%E6%B1%82%E6%95%91%7E%E5%A6%82%E5%9B%BE%2C%E5%9C%A8%E2%96%B3ABC%E4%B8%AD%2CDE%2F%2FAC%2C%E2%88%A0B%3D%E2%88%A0DAC%2CBD%3D5CM%2CCD%3D4CM%2C%E6%B1%82DE%E7%9A%84%E9%95%BF%7E)
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