已知三角形ABC是边长为1的等边三角形,BD=DC,角BDC=120度,M,N分别在AB,AC上,且角MDN=60度.求三角形AMN的周长今天9点之前给我答复把,明天就交了,不要拿我看不懂的方式来解
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![已知三角形ABC是边长为1的等边三角形,BD=DC,角BDC=120度,M,N分别在AB,AC上,且角MDN=60度.求三角形AMN的周长今天9点之前给我答复把,明天就交了,不要拿我看不懂的方式来解](/uploads/image/z/6627774-30-4.jpg?t=%E5%B7%B2%E7%9F%A5%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E6%98%AF%E8%BE%B9%E9%95%BF%E4%B8%BA1%E7%9A%84%E7%AD%89%E8%BE%B9%E4%B8%89%E8%A7%92%E5%BD%A2%2CBD%3DDC%2C%E8%A7%92BDC%3D120%E5%BA%A6%2CM%2CN%E5%88%86%E5%88%AB%E5%9C%A8AB%2CAC%E4%B8%8A%2C%E4%B8%94%E8%A7%92MDN%3D60%E5%BA%A6.%E6%B1%82%E4%B8%89%E8%A7%92%E5%BD%A2AMN%E7%9A%84%E5%91%A8%E9%95%BF%E4%BB%8A%E5%A4%A99%E7%82%B9%E4%B9%8B%E5%89%8D%E7%BB%99%E6%88%91%E7%AD%94%E5%A4%8D%E6%8A%8A%EF%BC%8C%E6%98%8E%E5%A4%A9%E5%B0%B1%E4%BA%A4%E4%BA%86%EF%BC%8C%E4%B8%8D%E8%A6%81%E6%8B%BF%E6%88%91%E7%9C%8B%E4%B8%8D%E6%87%82%E7%9A%84%E6%96%B9%E5%BC%8F%E6%9D%A5%E8%A7%A3)
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