如图,直立在点B处的标杆AB长2.6m,立在F处的观测者从点E处看到标杆顶A?树顶C在同一 与观察点F在同一直线上,已知BD=10m,FB=3m,人目高EF=1.7m,求树高DC
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![如图,直立在点B处的标杆AB长2.6m,立在F处的观测者从点E处看到标杆顶A?树顶C在同一 与观察点F在同一直线上,已知BD=10m,FB=3m,人目高EF=1.7m,求树高DC](/uploads/image/z/11505236-68-6.jpg?t=%E5%A6%82%E5%9B%BE%2C%E7%9B%B4%E7%AB%8B%E5%9C%A8%E7%82%B9B%E5%A4%84%E7%9A%84%E6%A0%87%E6%9D%86AB%E9%95%BF2.6m%2C%E7%AB%8B%E5%9C%A8F%E5%A4%84%E7%9A%84%E8%A7%82%E6%B5%8B%E8%80%85%E4%BB%8E%E7%82%B9E%E5%A4%84%E7%9C%8B%E5%88%B0%E6%A0%87%E6%9D%86%E9%A1%B6A%3F%E6%A0%91%E9%A1%B6C%E5%9C%A8%E5%90%8C%E4%B8%80+%E4%B8%8E%E8%A7%82%E5%AF%9F%E7%82%B9F%E5%9C%A8%E5%90%8C%E4%B8%80%E7%9B%B4%E7%BA%BF%E4%B8%8A%2C%E5%B7%B2%E7%9F%A5BD%3D10m%2CFB%3D3m%2C%E4%BA%BA%E7%9B%AE%E9%AB%98EF%3D1.7m%2C%E6%B1%82%E6%A0%91%E9%AB%98DC)
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