一道高中数学题目!请大家帮忙啊5、等边三角形ABC与直角梯形ABDE所在平面垂直,BD垂直AE,BC=BD=2,AE=2,O为AB中点. (1) 证明:CO垂直DE (2)求二面角C-DE-A的大小 (请给出过程!)
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/18 22:10:15
![一道高中数学题目!请大家帮忙啊5、等边三角形ABC与直角梯形ABDE所在平面垂直,BD垂直AE,BC=BD=2,AE=2,O为AB中点. (1) 证明:CO垂直DE (2)求二面角C-DE-A的大小 (请给出过程!)](/uploads/image/z/1526055-15-5.jpg?t=%E4%B8%80%E9%81%93%E9%AB%98%E4%B8%AD%E6%95%B0%E5%AD%A6%E9%A2%98%E7%9B%AE%21%E8%AF%B7%E5%A4%A7%E5%AE%B6%E5%B8%AE%E5%BF%99%E5%95%8A5%E3%80%81%E7%AD%89%E8%BE%B9%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E4%B8%8E%E7%9B%B4%E8%A7%92%E6%A2%AF%E5%BD%A2ABDE%E6%89%80%E5%9C%A8%E5%B9%B3%E9%9D%A2%E5%9E%82%E7%9B%B4%2CBD%E5%9E%82%E7%9B%B4AE%2CBC%3DBD%3D2%2CAE%3D2%2CO%E4%B8%BAAB%E4%B8%AD%E7%82%B9.+%EF%BC%881%EF%BC%89+%E8%AF%81%E6%98%8E%EF%BC%9ACO%E5%9E%82%E7%9B%B4DE+%EF%BC%882%EF%BC%89%E6%B1%82%E4%BA%8C%E9%9D%A2%E8%A7%92C-DE-A%E7%9A%84%E5%A4%A7%E5%B0%8F+%EF%BC%88%E8%AF%B7%E7%BB%99%E5%87%BA%E8%BF%87%E7%A8%8B%21%EF%BC%89)
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