名校
1 . 如图,在四棱锥
中,
,
,
,
,O为BD的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/21/93c016e1-d769-48d9-a7fa-ae437f30b7b3.png?resizew=169)
(1)证明:OP⊥平面
.
(2)若
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d02bd5cfe804460846423e77f72db10f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c8da8430ae9b811b82527eb944cea18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef699f5dc072b853cfe700c6f1abbbae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae8c7b69e2eed99438c8ceaa2b5d2cce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b57478478b0a2efceac49aef02fe01a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/21/93c016e1-d769-48d9-a7fa-ae437f30b7b3.png?resizew=169)
(1)证明:OP⊥平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/222caeed69cf757f2fe4ed030bdd0942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b2444e7dfd55d5738e153e857738aa.png)
您最近一年使用:0次
2023-12-20更新
|
279次组卷
|
9卷引用:广西崇左市2019-2020学年高二上学期期末考试理科数学试题
名校
解题方法
2 . 如图,在正方体
中,
为
的中点,
.求证:
![](https://img.xkw.com/dksih/QBM/2021/5/22/2726625096425472/2831394144395264/STEM/e3307d9c-8227-48e2-a8bb-3a56d5f44c13.png?resizew=226)
(1)
平面
;
(2)
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfbc0b5a8fbde804bd8425a4b76d207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a23f01af749100e1888bba06268843db.png)
![](https://img.xkw.com/dksih/QBM/2021/5/22/2726625096425472/2831394144395264/STEM/e3307d9c-8227-48e2-a8bb-3a56d5f44c13.png?resizew=226)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e96946eaa2878fb8433eb2a97797a32b.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b78172568aac9805d2ea2d5f742bf80c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13cfdc6224181d44e63aab43ddaf07ef.png)
您最近一年使用:0次
2021-10-17更新
|
1605次组卷
|
10卷引用:广西崇左高级中学2020-2021学年高一下学期开学考试数学(理)试题
广西崇左高级中学2020-2021学年高一下学期开学考试数学(理)试题陕西省渭南市韩城市2020-2021学年高一上学期期末数学试题陕西省西安市阎良区2020-2021学年高一上学期期末数学试题(已下线)8.5 空间直线、平面的垂直--2020--2021高中数学新教材配套提升训练(人教A版必修第二册)(已下线)8.6空间直线、平面的垂直(1)(精炼)-2020-2021学年高一数学一隅三反系列(人教A版2019必修第二册)(已下线)专题13.2 本图形位置关系(重点练)-2020-2021学年高一数学十分钟同步课堂专练(苏教版2019必修第二册)内蒙古自治区阿拉善盟第一中学2021-2022学年高二上学期期中考试数学(文)试题(已下线)8.6 空间直线、平面的垂直(精讲)-2021-2022学年高一数学一隅三反系列(人教A版2019必修第二册)湖北省武汉市常青联合体2021-2022学年高一下学期期末数学试题山东省潍坊市昌邑市潍坊实验中学2022-2023学年高二上学期9月月考数学试题
名校
3 . 设
,
为两个不重合的平面,m,n为两条不重合的直线,给出下列四个命题:①若
,
,则
;②若
,
,
,
,则
;③若
,
,
,则
;④若
,
,
与
相交且不垂直,则n与m不垂直,其中所有假命题的序号是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84b6e422b2e6f6dada4d8c369559a077.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fe920cd78db25f5b4df37d066e57800.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df0d37b44de48de51555fa95d94e33f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5986f2991d45fbf3578f08f27d9fd7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92c166c4d75211e5294eb440bf2a6350.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a042a14e1c3c915ad11544c9e1e57da9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39344e476725f3fbae35f2e73377a38b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a53cd751c44ad4d9ebd8e3243e751321.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80645381feb9746cc149da61d553974a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b59b1a01a6da42ff2a41e5b91ea301ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/384a65ca1ee3d7d86b988ca34c885e18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1b610e3c5b3d78a5730e7f3d736ac28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a042a14e1c3c915ad11544c9e1e57da9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f157205cb5cb4a538b09d989f2d9ae95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
A.①③ | B.②③④ | C.①④ | D.②③ |
您最近一年使用:0次
4 . 如图,在三棱柱
中,
底面
,D为
的中点,点P在棱
上,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/12/d11e39ad-4eeb-45ee-b664-f16d1bfefd63.png?resizew=139)
(1)求证:
平面
;
(2)若点B到平面
的距离为
,请确定点P的位置.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5ae8a050d7159d4296c2409e5bc0bf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/12/d11e39ad-4eeb-45ee-b664-f16d1bfefd63.png?resizew=139)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
(2)若点B到平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf4c26f3f4d96117f087400a0f32ece8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e1f118774f4f4bd15ed7dd43776be4.png)
您最近一年使用:0次
2020-12-13更新
|
388次组卷
|
3卷引用:广西崇左高级中学2020-2021学年高一上学期第三次月考数学试题
解题方法
5 . 如图,在四棱锥
中,
底面
,底面ABCD为正方形,且
,
为
上一动点,若
,则
的长度为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/ef8e7b24-916e-484f-9e14-f2b854a85e03.png?resizew=163)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e2942390d02efaff57473d103f7950a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f586ec271c8ba58611b4bb160ae1017.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5c62f22d7afc5627fcb86599faa8e1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/ef8e7b24-916e-484f-9e14-f2b854a85e03.png?resizew=163)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
6 . 如图,四棱锥
的底面
是边长为2的菱形,
,
是
的中点,
底面
,
.
![](https://img.xkw.com/dksih/QBM/2020/3/2/2410914409897984/2411792553254912/STEM/8c5072fccebe487d86b5ddbc81d58611.png?resizew=146)
(1)证明:平面
平面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ec435aa1401dbce7863b531bf2f3e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab2c27eac56fffa4cd7dbe1dcdf1a.png)
![](https://img.xkw.com/dksih/QBM/2020/3/2/2410914409897984/2411792553254912/STEM/8c5072fccebe487d86b5ddbc81d58611.png?resizew=146)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a26a7784c7419d8359fb119c8ecc03d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3668b8463c08e4e0dc594cd82af40891.png)
您最近一年使用:0次
7 . 如图,关于正方体
,下面结论错误 的是
![](https://img.xkw.com/dksih/QBM/2017/2/16/1625388714450944/1625564450111488/STEM/f1ca9d3b74244a5f8c8f2e1ba0f53226.png?resizew=112)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://img.xkw.com/dksih/QBM/2017/2/16/1625388714450944/1625564450111488/STEM/f1ca9d3b74244a5f8c8f2e1ba0f53226.png?resizew=112)
A.![]() ![]() |
B.![]() |
C.![]() ![]() |
D.该正方体的外接球和内切球的半径之比为![]() |
您最近一年使用:0次
2017-02-17更新
|
673次组卷
|
2卷引用:广西崇左高级中学2020-2021学年高一下学期开学考试数学(文)试题
8 . 如图,在三棱锥
中,
是等边三角形,∠PAC=∠PBC=90º.
(1)证明:AB⊥PC;
(2)若
,且平面
⊥平面
,求三棱锥
体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
(1)证明:AB⊥PC;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eea78bf026d76f1cb9cc3dc9349a193.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
您最近一年使用:0次
2016-11-30更新
|
1954次组卷
|
5卷引用:广西崇左高级中学2020-2021学年高一下学期开学考试数学(文)试题