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
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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](/uploads/image/z/8347499-35-9.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%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)
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