如图(1),ABCD是一张正方形纸片,E,F分别为AB,CD的终点,沿过点D的折痕将A角翻折,使得点A落在EF上(如图2),折痕交AE于点G,那么∠ADG等于多少度?你能证明你的结论吗?(提示:在直角三角形中,如
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![如图(1),ABCD是一张正方形纸片,E,F分别为AB,CD的终点,沿过点D的折痕将A角翻折,使得点A落在EF上(如图2),折痕交AE于点G,那么∠ADG等于多少度?你能证明你的结论吗?(提示:在直角三角形中,如](/uploads/image/z/2685130-34-0.jpg?t=%E5%A6%82%E5%9B%BE%EF%BC%881%EF%BC%89%2CABCD%E6%98%AF%E4%B8%80%E5%BC%A0%E6%AD%A3%E6%96%B9%E5%BD%A2%E7%BA%B8%E7%89%87%2CE%2CF%E5%88%86%E5%88%AB%E4%B8%BAAB%2CCD%E7%9A%84%E7%BB%88%E7%82%B9%2C%E6%B2%BF%E8%BF%87%E7%82%B9D%E7%9A%84%E6%8A%98%E7%97%95%E5%B0%86A%E8%A7%92%E7%BF%BB%E6%8A%98%2C%E4%BD%BF%E5%BE%97%E7%82%B9A%E8%90%BD%E5%9C%A8EF%E4%B8%8A%EF%BC%88%E5%A6%82%E5%9B%BE2%EF%BC%89%2C%E6%8A%98%E7%97%95%E4%BA%A4AE%E4%BA%8E%E7%82%B9G%2C%E9%82%A3%E4%B9%88%E2%88%A0ADG%E7%AD%89%E4%BA%8E%E5%A4%9A%E5%B0%91%E5%BA%A6%3F%E4%BD%A0%E8%83%BD%E8%AF%81%E6%98%8E%E4%BD%A0%E7%9A%84%E7%BB%93%E8%AE%BA%E5%90%97%3F%EF%BC%88%E6%8F%90%E7%A4%BA%EF%BC%9A%E5%9C%A8%E7%9B%B4%E8%A7%92%E4%B8%89%E8%A7%92%E5%BD%A2%E4%B8%AD%2C%E5%A6%82)
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