过正方体
顶点A作平面
,使
//平面
,
和
的中点分别为E和F,则直线EF与平面
所成角为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fbafedc202bd0d86c4dfdece9f8f4fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
22-23高一下·湖北武汉·阶段练习 查看更多[2]
更新时间:2023-06-13 23:51:06
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解题方法
【推荐1】已知三棱锥
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的体积是____________ .
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【推荐2】在棱长为1的正方体
中,
为线段
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【推荐3】如图,在三棱锥
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解题方法
【推荐1】在正三棱柱
中,
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,
分别为
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,
的中点,
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①
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【推荐2】在正方体
中,
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解题方法
【推荐1】如图,矩形
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(4)存在某个位置,使
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(1)
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(2)点M在某个球面上运动
(3)存在某个位置,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2181c78134c310f746eab44b9124e63b.png)
(4)存在某个位置,使
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【推荐2】已知△ABC所在平面外一点P到△ABC三顶点的距离都相等,则点P在平面ABC内的射影是△ABC的________ .
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