已知,如图,AD是△ABC的外角∠AEC的平分线,AD与△ABC的外接圆相交于点D求证:DB=DC我已经想出来了,不过这20分我也不想浪费,只要说出解这到题的最重要的两个字,
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/19 03:11:33
![已知,如图,AD是△ABC的外角∠AEC的平分线,AD与△ABC的外接圆相交于点D求证:DB=DC我已经想出来了,不过这20分我也不想浪费,只要说出解这到题的最重要的两个字,](/uploads/image/z/2086689-57-9.jpg?t=%E5%B7%B2%E7%9F%A5%2C%E5%A6%82%E5%9B%BE%2CAD%E6%98%AF%E2%96%B3ABC%E7%9A%84%E5%A4%96%E8%A7%92%E2%88%A0AEC%E7%9A%84%E5%B9%B3%E5%88%86%E7%BA%BF%2CAD%E4%B8%8E%E2%96%B3ABC%E7%9A%84%E5%A4%96%E6%8E%A5%E5%9C%86%E7%9B%B8%E4%BA%A4%E4%BA%8E%E7%82%B9D%E6%B1%82%E8%AF%81%EF%BC%9ADB%3DDC%E6%88%91%E5%B7%B2%E7%BB%8F%E6%83%B3%E5%87%BA%E6%9D%A5%E4%BA%86%EF%BC%8C%E4%B8%8D%E8%BF%87%E8%BF%9920%E5%88%86%E6%88%91%E4%B9%9F%E4%B8%8D%E6%83%B3%E6%B5%AA%E8%B4%B9%EF%BC%8C%E5%8F%AA%E8%A6%81%E8%AF%B4%E5%87%BA%E8%A7%A3%E8%BF%99%E5%88%B0%E9%A2%98%E7%9A%84%E6%9C%80%E9%87%8D%E8%A6%81%E7%9A%84%E4%B8%A4%E4%B8%AA%E5%AD%97%EF%BC%8C)
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