1在锐角三角形ABC中BE,CF是高,在BE,CF或其延长线上分别截取BP=CA,CQ=AB,再过P,Q作PR垂直BC,QT垂直BC,R,T为垂足若PR=8,QT=6那么BC=?2在三角形ABC和三角形DEF中(A对DB对EC对F),AH和DK是高,若AH=DK,AB=DE,角C=角F,
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![1在锐角三角形ABC中BE,CF是高,在BE,CF或其延长线上分别截取BP=CA,CQ=AB,再过P,Q作PR垂直BC,QT垂直BC,R,T为垂足若PR=8,QT=6那么BC=?2在三角形ABC和三角形DEF中(A对DB对EC对F),AH和DK是高,若AH=DK,AB=DE,角C=角F,](/uploads/image/z/3987923-59-3.jpg?t=1%E5%9C%A8%E9%94%90%E8%A7%92%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E4%B8%ADBE%2CCF%E6%98%AF%E9%AB%98%2C%E5%9C%A8BE%2CCF%E6%88%96%E5%85%B6%E5%BB%B6%E9%95%BF%E7%BA%BF%E4%B8%8A%E5%88%86%E5%88%AB%E6%88%AA%E5%8F%96BP%3DCA%2CCQ%3DAB%2C%E5%86%8D%E8%BF%87P%2CQ%E4%BD%9CPR%E5%9E%82%E7%9B%B4BC%2CQT%E5%9E%82%E7%9B%B4BC%2CR%2CT%E4%B8%BA%E5%9E%82%E8%B6%B3%E8%8B%A5PR%3D8%2CQT%3D6%E9%82%A3%E4%B9%88BC%3D%3F2%E5%9C%A8%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E5%92%8C%E4%B8%89%E8%A7%92%E5%BD%A2DEF%E4%B8%AD%EF%BC%88A%E5%AF%B9DB%E5%AF%B9EC%E5%AF%B9F%EF%BC%89%2CAH%E5%92%8CDK%E6%98%AF%E9%AB%98%2C%E8%8B%A5AH%3DDK%2CAB%3DDE%2C%E8%A7%92C%3D%E8%A7%92F%2C)
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