1 . 如图,
是圆柱
的一条母线,
是底面的一条直径,
是圆
上一点,且
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/18/faca43d9-d29d-4868-84d2-84a157eefa01.png?resizew=137)
(1)证明:平面
平面
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192f4f9446c954a291f779d963f90257.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37750daa8ba3b3fe3e9e2092f81c848.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/18/faca43d9-d29d-4868-84d2-84a157eefa01.png?resizew=137)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf6dc837ae85207789b94d109c5c2eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
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解题方法
2 . 如图所示,在棱长为2的正方体
中,P是线段
上的动点,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/13/322e003a-2fb8-43c7-8f72-2f58c416a694.png?resizew=146)
A.平面![]() |
B.存在点P,使![]() |
C.存在点P,使直线![]() ![]() ![]() |
D.存在点P,使点A,C到平面![]() |
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3 . 如图,在三棱柱
中,已知
侧面
,
,
,
,点
为棱
的中点.
(1)证明:
平面
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f144992e1cbee34868abce1e5ad38c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bae07e0018faaeb9365b82e1be8c193d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35b4c85b8883260919f5431ca1922479.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/26/6498ee76-7e69-4c9a-ad80-601b07c486b4.png?resizew=159)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06ad7c180d6d084ecb25f23cb6fe9b10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea55a7e39361987096953d3a3ee1eaa4.png)
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4 . 如图,正方体
棱长为1,点
为
的中点,下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/24/0ff0b169-af98-4d83-aeb7-269e263d9a07.png?resizew=193)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9a0c3a4e61b97fa9bc58f3179fc2958.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/24/0ff0b169-af98-4d83-aeb7-269e263d9a07.png?resizew=193)
A.![]() | B.![]() ![]() |
C.点![]() ![]() ![]() | D.![]() ![]() ![]() |
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|
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2卷引用:江西省九校2022-2023学年高二下学期开学联考数学试题
5 . 如图,在正四棱台
中,
.
(1)证明:
.
(2)若正四棱台
的高为3,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d134433600df75f2a5d0f35deb2cac90.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/2/5f536143-82cd-4116-8933-d569091b5b55.png?resizew=178)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02a0e00113872f921116b6c0c3177d0f.png)
(2)若正四棱台
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f96c673a2381f118ea2d3efc0bca1f3.png)
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6 . 如图,在棱长为2的正方体
中,P为
的中点,Q为
上任意一点,E、F为CD上任意两点,且EF的长为1,则下列四个值中为定值的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/10/fc131878-46f6-46f4-962d-bc796e155ffa.png?resizew=160)
A.点P到平面QEF的距离 | B.二面角![]() |
C.直线PQ与平面PEF所成的角 | D.三棱锥![]() |
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解题方法
7 . 如图,在三棱锥
中,三条侧棱OA,OB,OC两两垂直,且
,M为
内部一动点,过M分别作平面OAB,平面OBC,平面OAC的垂线,垂足分别为P,Q,R.
![](https://img.xkw.com/dksih/QBM/2022/5/7/2974506010230784/2975624099708928/STEM/2b11d325-7f6d-4c17-85a9-065fc761d527.png?resizew=271)
①直线PR与直线BC是异面直线;
②
为定值;
③三棱锥
的外接球表面积的最小值为
;
④当
时,平面PQR与平面OBC所成的锐二面角为45°.
则以上结论中所有正确结论的序号是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4278c0911e7df78965e78cff69cac5f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbab39da847da8a559994b6c6004aa60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/2022/5/7/2974506010230784/2975624099708928/STEM/2b11d325-7f6d-4c17-85a9-065fc761d527.png?resizew=271)
①直线PR与直线BC是异面直线;
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b4389530f4d31bc0ae46d0edfcdd2dd.png)
③三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64bab74dadb5557a3762947e52feb532.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4966e5af166b69a0a38a98abf555b6b.png)
④当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38db6f3badb51bef6fa220ce110af854.png)
则以上结论中所有正确结论的序号是
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2022-05-09更新
|
514次组卷
|
3卷引用:福建省福州第四中学2022-2023学年高二下学期开学考数学试题
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解题方法
8 . 如图,直三棱柱
的体积为4,
的面积为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/13/be969d51-171f-425b-9098-b882eaad52f8.png?resizew=165)
(1)求A到平面
的距离;
(2)设D为
的中点,
,平面
平面
,求二面角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e827641feb4179bca7033ed8760bf728.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/13/be969d51-171f-425b-9098-b882eaad52f8.png?resizew=165)
(1)求A到平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afac7c616bbb14e1ed428a3c507c7dc.png)
(2)设D为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeed487430a5b8a330f2d0c52166521a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21dee56b9f36ba8f76fe67b76383636b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0218542daefa15910d5111b27e71f5b3.png)
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9 . 设正方体
的棱长为1,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
A.![]() |
B.![]() ![]() |
C.两条平行直线![]() ![]() |
D.点![]() ![]() ![]() |
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2023-01-03更新
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10 . 如图,正方体
的棱长为1,则下列四个命题不正确的是( ).
![](https://img.xkw.com/dksih/QBM/2020/9/13/2549128544616448/2549861490761728/STEM/ecac8c8d509f47148bea4fd2598e11d7.png?resizew=202)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://img.xkw.com/dksih/QBM/2020/9/13/2549128544616448/2549861490761728/STEM/ecac8c8d509f47148bea4fd2598e11d7.png?resizew=202)
A.直线![]() ![]() ![]() |
B.点![]() ![]() ![]() |
C.两条异面直线![]() ![]() ![]() |
D.三棱柱![]() ![]() |
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2020-09-14更新
|
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9卷引用:山东省济南市历城第二中学2023-2024学年学年高三上学期开学摸底考试检测数学试题
山东省济南市历城第二中学2023-2024学年学年高三上学期开学摸底考试检测数学试题江苏省苏州市2020-2021学年高三上学期9月期初调研数学试题江苏省苏州市相城区陆慕高级中学2020-2021学年高三上学期期初数学试题吉林省长春市长春外国语学校2022-2023学年高一下学期6月月考数学试题江苏省镇江市镇江第一中学2024届高三上学期12月阶段测试数学试题重庆市暨华中学校2021-2022学年高二上学期10月月考数学试题天津市第一中学滨海学校2021-2022学年高一下学期线上学习适应性测试数学试题广西桂林市田家炳中学2023届高三上学期10月月考数学试题河南省漯河市实验高级中学2024届高三上学期1月阶段模拟测试数学试题