棱长为2的正方体
中,点
到平面
的距离为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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21-22高一下·甘肃天水·阶段练习 查看更多[2]
甘肃省天水市第一中学2021-2022学年高一下学期第二阶段考数学试题(已下线)第02讲 玩转立体几何中的角度、体积、距离问题-2022年暑假高一升高二数学衔接知识自学讲义(人教A版2019)
更新时间:2022-06-13 21:30:21
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【推荐1】已知三棱锥
的各顶点都在球O上,点M,N分别是
,
的中点,
平面
,
,
,则下列结论正确的是___________ .
①
平面
;
②球O的体积是
;
③二面角
的余弦值是
;
④平面
被球O所截的截面面积是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ab3a73f947fe58f60d067b9c51e76a5.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
②球O的体积是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c47eb6743075d149f8dc688aca72a00a.png)
③二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd29cc627d76412c236aac6b29fa0fdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dee14db57f0c762aad845cf5b4a243c0.png)
④平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212a67f115d1cbe69f100b489babe5f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50167609e264c9669adaa4f4a23cc092.png)
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【推荐2】如图,定点A和B都在平面α内,
,定点
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是
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ae29cf15aa9e3b33373709999a71418.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1187abe3501a7654769d1b54af2cdac.png)
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【推荐1】在等腰梯形
中,
为
的中点.将
沿
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到达点
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时,三棱锥
外接球的球心到平面
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42f94836f9b90b5e9bb7c5c7b7d46be1.png)
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【推荐2】如图,四棱锥
中,底面
是正方形,
平面
.
,
,
分别是
,
的中点,
是棱
上的动点,下列结论中正确的序号是______ .
①![](https://staticzujuan.xkw.com/quesimg/Upload/formula/534446534e88ab2e1b6145c03a4044f6.png)
②存在点
,使
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21665d21bbfb04410c78345de1fd15ae.png)
③存在点
,使直线
与
所成的角为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
④点
到平面
与平面
的距离和为定值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/534446534e88ab2e1b6145c03a4044f6.png)
②存在点
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc9d7c0906fb6957aeba1945dd144d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21665d21bbfb04410c78345de1fd15ae.png)
③存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
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④点
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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