如图①,△ABC是等腰直角三角形,∠ACB=90°,O为AB的中点,点D为AB边上任意一点,以D为顶点作等腰直角△DEF,斜边EF经过点O,且使EO=FO,连结CF、BF、CD,很明显点C、F、O在同一条直线上(1)请写出线段BF
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![如图①,△ABC是等腰直角三角形,∠ACB=90°,O为AB的中点,点D为AB边上任意一点,以D为顶点作等腰直角△DEF,斜边EF经过点O,且使EO=FO,连结CF、BF、CD,很明显点C、F、O在同一条直线上(1)请写出线段BF](/uploads/image/z/612705-57-5.jpg?t=%E5%A6%82%E5%9B%BE%E2%91%A0%2C%E2%96%B3ABC%E6%98%AF%E7%AD%89%E8%85%B0%E7%9B%B4%E8%A7%92%E4%B8%89%E8%A7%92%E5%BD%A2%2C%E2%88%A0ACB%3D90%C2%B0%2CO%E4%B8%BAAB%E7%9A%84%E4%B8%AD%E7%82%B9%2C%E7%82%B9D%E4%B8%BAAB%E8%BE%B9%E4%B8%8A%E4%BB%BB%E6%84%8F%E4%B8%80%E7%82%B9%2C%E4%BB%A5D%E4%B8%BA%E9%A1%B6%E7%82%B9%E4%BD%9C%E7%AD%89%E8%85%B0%E7%9B%B4%E8%A7%92%E2%96%B3DEF%2C%E6%96%9C%E8%BE%B9EF%E7%BB%8F%E8%BF%87%E7%82%B9O%2C%E4%B8%94%E4%BD%BFEO%3DFO%2C%E8%BF%9E%E7%BB%93CF%E3%80%81BF%E3%80%81CD%2C%E5%BE%88%E6%98%8E%E6%98%BE%E7%82%B9C%E3%80%81F%E3%80%81O%E5%9C%A8%E5%90%8C%E4%B8%80%E6%9D%A1%E7%9B%B4%E7%BA%BF%E4%B8%8A%EF%BC%881%EF%BC%89%E8%AF%B7%E5%86%99%E5%87%BA%E7%BA%BF%E6%AE%B5BF)
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