有图,数学题,今天要要啊.!1.如图1-2,在三角形ABC中,AB=5,AC=3,则BC上的中线AD的取值范围是多少?2.如图1-1,在三角形ABC中,AD垂直BC,CE垂直AB,垂足分别为D,E.AD,CE交于点H.已知EH=EB=3,AE=4求CH的长用初中水
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![有图,数学题,今天要要啊.!1.如图1-2,在三角形ABC中,AB=5,AC=3,则BC上的中线AD的取值范围是多少?2.如图1-1,在三角形ABC中,AD垂直BC,CE垂直AB,垂足分别为D,E.AD,CE交于点H.已知EH=EB=3,AE=4求CH的长用初中水](/uploads/image/z/6361414-70-4.jpg?t=%E6%9C%89%E5%9B%BE%2C%E6%95%B0%E5%AD%A6%E9%A2%98%2C%E4%BB%8A%E5%A4%A9%E8%A6%81%E8%A6%81%E5%95%8A.%211.%E5%A6%82%E5%9B%BE1-2%2C%E5%9C%A8%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E4%B8%AD%2CAB%3D5%2CAC%3D3%2C%E5%88%99BC%E4%B8%8A%E7%9A%84%E4%B8%AD%E7%BA%BFAD%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4%E6%98%AF%E5%A4%9A%E5%B0%91%3F2.%E5%A6%82%E5%9B%BE1-1%2C%E5%9C%A8%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E4%B8%AD%2CAD%E5%9E%82%E7%9B%B4BC%2CCE%E5%9E%82%E7%9B%B4AB%2C%E5%9E%82%E8%B6%B3%E5%88%86%E5%88%AB%E4%B8%BAD%2CE.AD%2CCE%E4%BA%A4%E4%BA%8E%E7%82%B9H.%E5%B7%B2%E7%9F%A5EH%3DEB%3D3%2CAE%3D4%E6%B1%82CH%E7%9A%84%E9%95%BF%E7%94%A8%E5%88%9D%E4%B8%AD%E6%B0%B4)
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