如图,在直角坐标系中,点B坐标为(-4,0),点C与点B关于原点O对称,点A是y轴上一动点其坐标为(0,k),BE,CD分别为△ABC中AC,AB边上的高,垂足分别为E,D求(1)当k=3时,求AB的长(2)试说明△DOE是等腰三
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![如图,在直角坐标系中,点B坐标为(-4,0),点C与点B关于原点O对称,点A是y轴上一动点其坐标为(0,k),BE,CD分别为△ABC中AC,AB边上的高,垂足分别为E,D求(1)当k=3时,求AB的长(2)试说明△DOE是等腰三](/uploads/image/z/3009661-61-1.jpg?t=%E5%A6%82%E5%9B%BE%2C%E5%9C%A8%E7%9B%B4%E8%A7%92%E5%9D%90%E6%A0%87%E7%B3%BB%E4%B8%AD%2C%E7%82%B9B%E5%9D%90%E6%A0%87%E4%B8%BA%28-4%2C0%29%2C%E7%82%B9C%E4%B8%8E%E7%82%B9B%E5%85%B3%E4%BA%8E%E5%8E%9F%E7%82%B9O%E5%AF%B9%E7%A7%B0%2C%E7%82%B9A%E6%98%AFy%E8%BD%B4%E4%B8%8A%E4%B8%80%E5%8A%A8%E7%82%B9%E5%85%B6%E5%9D%90%E6%A0%87%E4%B8%BA%EF%BC%880%2Ck%EF%BC%89%2CBE%2CCD%E5%88%86%E5%88%AB%E4%B8%BA%E2%96%B3ABC%E4%B8%ADAC%2CAB%E8%BE%B9%E4%B8%8A%E7%9A%84%E9%AB%98%2C%E5%9E%82%E8%B6%B3%E5%88%86%E5%88%AB%E4%B8%BAE%2CD%E6%B1%82%EF%BC%881%EF%BC%89%E5%BD%93k%3D3%E6%97%B6%2C%E6%B1%82AB%E7%9A%84%E9%95%BF%EF%BC%882%EF%BC%89%E8%AF%95%E8%AF%B4%E6%98%8E%E2%96%B3DOE%E6%98%AF%E7%AD%89%E8%85%B0%E4%B8%89)
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