如图,在等腰梯形ABCD中,AD//BC,BC=4AD=4倍根号2,角B=45°.直角三角板含45度角的顶点E在边BC上移动,一直角边始终经过点A,斜边与CD交于点F.若△ABE为等腰三角形,则CF的长为多少?(有三种答案)
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![如图,在等腰梯形ABCD中,AD//BC,BC=4AD=4倍根号2,角B=45°.直角三角板含45度角的顶点E在边BC上移动,一直角边始终经过点A,斜边与CD交于点F.若△ABE为等腰三角形,则CF的长为多少?(有三种答案)](/uploads/image/z/2703005-53-5.jpg?t=%E5%A6%82%E5%9B%BE%2C%E5%9C%A8%E7%AD%89%E8%85%B0%E6%A2%AF%E5%BD%A2ABCD%E4%B8%AD%2CAD%2F%2FBC%2CBC%3D4AD%3D4%E5%80%8D%E6%A0%B9%E5%8F%B72%2C%E8%A7%92B%3D45%C2%B0.%E7%9B%B4%E8%A7%92%E4%B8%89%E8%A7%92%E6%9D%BF%E5%90%AB45%E5%BA%A6%E8%A7%92%E7%9A%84%E9%A1%B6%E7%82%B9E%E5%9C%A8%E8%BE%B9BC%E4%B8%8A%E7%A7%BB%E5%8A%A8%2C%E4%B8%80%E7%9B%B4%E8%A7%92%E8%BE%B9%E5%A7%8B%E7%BB%88%E7%BB%8F%E8%BF%87%E7%82%B9A%2C%E6%96%9C%E8%BE%B9%E4%B8%8ECD%E4%BA%A4%E4%BA%8E%E7%82%B9F.%E8%8B%A5%E2%96%B3ABE%E4%B8%BA%E7%AD%89%E8%85%B0%E4%B8%89%E8%A7%92%E5%BD%A2%2C%E5%88%99CF%E7%9A%84%E9%95%BF%E4%B8%BA%E5%A4%9A%E5%B0%91%3F%EF%BC%88%E6%9C%89%E4%B8%89%E7%A7%8D%E7%AD%94%E6%A1%88%EF%BC%89)
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