点P是等腰直角三角形ABC底边BC上一点,过点P作BA,AC的垂线,垂足是E,F,点D为BC的中点(1)求证:DE垂直DF(2)当点P在BC的延长线上时,DE垂直DF是否成立?说明理由
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![点P是等腰直角三角形ABC底边BC上一点,过点P作BA,AC的垂线,垂足是E,F,点D为BC的中点(1)求证:DE垂直DF(2)当点P在BC的延长线上时,DE垂直DF是否成立?说明理由](/uploads/image/z/9457150-22-0.jpg?t=%E7%82%B9P%E6%98%AF%E7%AD%89%E8%85%B0%E7%9B%B4%E8%A7%92%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E5%BA%95%E8%BE%B9BC%E4%B8%8A%E4%B8%80%E7%82%B9%2C%E8%BF%87%E7%82%B9P%E4%BD%9CBA%2CAC%E7%9A%84%E5%9E%82%E7%BA%BF%2C%E5%9E%82%E8%B6%B3%E6%98%AFE%2CF%2C%E7%82%B9D%E4%B8%BABC%E7%9A%84%E4%B8%AD%E7%82%B9%EF%BC%881%EF%BC%89%E6%B1%82%E8%AF%81%EF%BC%9ADE%E5%9E%82%E7%9B%B4DF%EF%BC%882%EF%BC%89%E5%BD%93%E7%82%B9P%E5%9C%A8BC%E7%9A%84%E5%BB%B6%E9%95%BF%E7%BA%BF%E4%B8%8A%E6%97%B6%2CDE%E5%9E%82%E7%9B%B4DF%E6%98%AF%E5%90%A6%E6%88%90%E7%AB%8B%3F%E8%AF%B4%E6%98%8E%E7%90%86%E7%94%B1)
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