1.如图,在△ABC中,∠BAC=90°,AB=AC,MN是过点A的直线,BD⊥MN于D,CE⊥MN于E. (1)试判定:①BD=AE吗?②DE与CE、BD的关系,并说明理由; (2)将MN绕点A旋转,当DE与BC相交时(交点不在B、C两点),BD=AE吗?画
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![1.如图,在△ABC中,∠BAC=90°,AB=AC,MN是过点A的直线,BD⊥MN于D,CE⊥MN于E. (1)试判定:①BD=AE吗?②DE与CE、BD的关系,并说明理由; (2)将MN绕点A旋转,当DE与BC相交时(交点不在B、C两点),BD=AE吗?画](/uploads/image/z/1737749-29-9.jpg?t=1.%E5%A6%82%E5%9B%BE%2C%E5%9C%A8%E2%96%B3ABC%E4%B8%AD%2C%E2%88%A0BAC%3D90%C2%B0%2CAB%3DAC%2CMN%E6%98%AF%E8%BF%87%E7%82%B9A%E7%9A%84%E7%9B%B4%E7%BA%BF%2CBD%E2%8A%A5MN%E4%BA%8ED%2CCE%E2%8A%A5MN%E4%BA%8EE.+%EF%BC%881%EF%BC%89%E8%AF%95%E5%88%A4%E5%AE%9A%EF%BC%9A%E2%91%A0BD%3DAE%E5%90%97%3F%E2%91%A1DE%E4%B8%8ECE%E3%80%81BD%E7%9A%84%E5%85%B3%E7%B3%BB%2C%E5%B9%B6%E8%AF%B4%E6%98%8E%E7%90%86%E7%94%B1%EF%BC%9B+%EF%BC%882%EF%BC%89%E5%B0%86MN%E7%BB%95%E7%82%B9A%E6%97%8B%E8%BD%AC%2C%E5%BD%93DE%E4%B8%8EBC%E7%9B%B8%E4%BA%A4%E6%97%B6%EF%BC%88%E4%BA%A4%E7%82%B9%E4%B8%8D%E5%9C%A8B%E3%80%81C%E4%B8%A4%E7%82%B9%EF%BC%89%2CBD%3DAE%E5%90%97%3F%E7%94%BB)
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