已知正方体
的棱长为1,点O在线段
上且
,则点O到平面
的距离是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
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2024高一下·全国·专题练习 查看更多[1]
(已下线)8.6.2 直线与平面垂直【第二练】“上好三节课,做好三套题“高中数学素养晋级之路
更新时间:2024-05-06 10:10:32
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【推荐1】如图,已知四棱锥
的底面是边长为2的菱形,且
,
,
平面ABCD,F,O分别是PA,BD的中点,E是线段PB上的动点,给出下列四个结论:
①
;②
;③直线PO与底面ABCD所成角的正弦值为
;④
面积的取值范围是
.______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
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①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8066f2f5e880d2217bc7f576920aaf69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45978875144e212f1ca6fa4a77ad648c.png)
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【推荐2】已知正方体
的棱
的中点为
与
交于点
,平面
过点
,且与直线
垂直,若
,则平面
截该正方体所得截面图形的面积为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd694ad3a4733c7c84aaa7946aeea4de.png)
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【推荐1】已知边长为2的正△
,现沿高线
翻折而形成四面体
,且使得二面角
的平面角为
,则点
到面
的距离为_________ ;此时四面体
外接球的表面积为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
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解题方法
【推荐2】底面为矩形的直四棱柱
中,
,点
在棱
上且满足
分别为棱
的中点,
是底面
内一点,若直线
与平面
垂直,则点
到平面
的距离的大小是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25462b67863d8452ab9bd452eb2b91a1.png)
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