在△ABC中.AC=BC,∠ACB=90°,D为AC中点.(1)如图1,E为线段DC上任意一点,将线段DE绕点D逆时针旋转90°得到线段DF,连接CF,过点F作FH⊥FC,交直线AB于点H.判断FH与FC的数量关系并加以证明.(2)如图2,若E
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![在△ABC中.AC=BC,∠ACB=90°,D为AC中点.(1)如图1,E为线段DC上任意一点,将线段DE绕点D逆时针旋转90°得到线段DF,连接CF,过点F作FH⊥FC,交直线AB于点H.判断FH与FC的数量关系并加以证明.(2)如图2,若E](/uploads/image/z/5319147-3-7.jpg?t=%E5%9C%A8%E2%96%B3ABC%E4%B8%AD.AC%EF%BC%9DBC%2C%E2%88%A0ACB%3D90%C2%B0%2CD%E4%B8%BAAC%E4%B8%AD%E7%82%B9.%EF%BC%881%EF%BC%89%E5%A6%82%E5%9B%BE1%2CE%E4%B8%BA%E7%BA%BF%E6%AE%B5DC%E4%B8%8A%E4%BB%BB%E6%84%8F%E4%B8%80%E7%82%B9%2C%E5%B0%86%E7%BA%BF%E6%AE%B5DE%E7%BB%95%E7%82%B9D%E9%80%86%E6%97%B6%E9%92%88%E6%97%8B%E8%BD%AC90%C2%B0%E5%BE%97%E5%88%B0%E7%BA%BF%E6%AE%B5DF%2C%E8%BF%9E%E6%8E%A5CF%2C%E8%BF%87%E7%82%B9F%E4%BD%9CFH%E2%8A%A5FC%2C%E4%BA%A4%E7%9B%B4%E7%BA%BFAB%E4%BA%8E%E7%82%B9H.%E5%88%A4%E6%96%ADFH%E4%B8%8EFC%E7%9A%84%E6%95%B0%E9%87%8F%E5%85%B3%E7%B3%BB%E5%B9%B6%E5%8A%A0%E4%BB%A5%E8%AF%81%E6%98%8E.%EF%BC%882%EF%BC%89%E5%A6%82%E5%9B%BE2%2C%E8%8B%A5E)
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