解题方法
1 . 如图所示,正方形ADEF与梯形ABCD所在的平面互相垂直,已知
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/73e79a0f-8581-4fa1-a9e6-d307229998c3.png?resizew=215)
(1)求证:
平面
;
(2)连接
,求多面体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb2dd10731b99c0f4f89ee957f8a239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffda707068a4a1778e79da6f20fb86d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/73e79a0f-8581-4fa1-a9e6-d307229998c3.png?resizew=215)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c8ccd4181f956f6e0140bf0ab8f0716.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
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2022-05-07更新
|
594次组卷
|
3卷引用:重庆市缙云教育联盟2021-2022学年高一下学期5月质量检测数学试题
名校
2 . 在棱长为1的正方体
中,点M是
的中点,点P,Q,R在底面四边形ABCD内(包括边界),![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24006d28116bc097933cc90bcc0ea69f.png)
平面
,
,点R到平面
的距离等于它到点D的距离,则( )
![](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/24006d28116bc097933cc90bcc0ea69f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bfb537a63ec2e7f085c0bb6eb1b2b11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9fa37bb4761118ea5dcb23a8de9ee8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
A.点P的轨迹的长度为![]() | B.点Q的轨迹的长度为![]() |
C.PQ长度的最小值为![]() | D.PR长度的最小值为![]() |
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2022-04-30更新
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6卷引用:重庆市渝高中学校2024届高三第七次质量检测(月考)数学试题
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3 . 如图,已知正方体
的棱长为4,
,
分别是棱
和
的中点,
是侧面
内的动点,且
平面
,当
的外接圆面积最小时,三棱锥
的外接球的表面积为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44a53f3642feb20eee0af47001b5ffe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59375dfae3a8ec264204cfe78caac97d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea6b87654a4b5604ea8ca50a52adb442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c5758391203b4105876f9b3f62dd054.png)
![](https://img.xkw.com/dksih/QBM/2022/3/29/2946459840069632/2948598897213440/STEM/dc58b473-b3fb-4879-9eb9-b04cc32d5c24.png?resizew=167)
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2022-04-01更新
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5卷引用:重庆市石柱中学校2021-2022学年高二上学期第一次月考数学试题
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4 . 圆柱
中,
为圆
的直径,
、
、
都是圆柱
的母线,
.
![](https://img.xkw.com/dksih/QBM/2022/2/3/2908238868004864/2940484600758272/STEM/27f7ecddedec402ab3ac837ad964fc1c.png?resizew=206)
(1)求证
平面
;
(2)若
,求锐二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e65ac334119ccd6204402a7aba29a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1642eec556eb252de9c1ab7bb5ca90b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4083c581c6027c4b2ae7e3b3749f485.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e65ac334119ccd6204402a7aba29a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b46b2ff7904a600687703d536dd603.png)
![](https://img.xkw.com/dksih/QBM/2022/2/3/2908238868004864/2940484600758272/STEM/27f7ecddedec402ab3ac837ad964fc1c.png?resizew=206)
(1)求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15d8662513d307ed16683319e997494d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fd943c914d3a080719c8fcda4b2cb3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f8e82d52f3b44b7cd6b9f2cc1788e2e.png)
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名校
解题方法
5 . 如图,在棱长为2的正方体
中,点
是
的中点,动点
在底面
内(不包括边界).若
平面
,则
的最小值是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6813066ab6672e10749e502ff8dc702f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de9078475c350c04bd97666d808dd55a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c407eeb34204a1df967b8fbe481cb04d.png)
![](https://img.xkw.com/dksih/QBM/2021/12/6/2866745284509696/2868074143580160/STEM/90725739-9d13-4de2-a8b7-4e0ffe49eddc.png?resizew=168)
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2021-12-08更新
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2卷引用:重庆市第十一中学校2021-2022学年高二上学期10月质量抽测数学试题
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6 . 如图,AP是圆柱的母线,正△ABC是该圆柱的下底面的内接三角形,D,E,F分别为BC,PB,AB的中点,G是EF的中点,且AP=AC.
![](https://img.xkw.com/dksih/QBM/2021/11/19/2854639979487232/2858441973432320/STEM/c4c74883-a062-4fd1-9673-0b9c6354a888.png)
(1)求证:DG
平面PAC;
(2)求直线DG与平面PBC所成角的正弦值.
![](https://img.xkw.com/dksih/QBM/2021/11/19/2854639979487232/2858441973432320/STEM/c4c74883-a062-4fd1-9673-0b9c6354a888.png)
(1)求证:DG
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
(2)求直线DG与平面PBC所成角的正弦值.
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2021-11-24更新
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3卷引用:重庆市名校联盟2021?2022学年高二上学期第一次联合考试数学试题
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7 . 如图,多面体ABCDEF中,DE⊥平面ABCD,底面ABCD是菱形,AB=2,∠BAD=60°,四边形BDEF是正方形.
![](https://img.xkw.com/dksih/QBM/2021/11/19/2854712830689280/2857331093274624/STEM/7aa19aee-ce29-46f3-b057-822b4ac118c0.png?resizew=258)
(1)求证;CF∥平面AED;
(2)求直线AF与平面ECF所成角的正弦值.
![](https://img.xkw.com/dksih/QBM/2021/11/19/2854712830689280/2857331093274624/STEM/7aa19aee-ce29-46f3-b057-822b4ac118c0.png?resizew=258)
(1)求证;CF∥平面AED;
(2)求直线AF与平面ECF所成角的正弦值.
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2021-11-23更新
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4卷引用:重庆市朝阳中学2021-2022学年高二上学期10月月考数学试题
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8 . 在矩形
中,
点
分别在
上,且
.沿
将四边形
翻折至四边形
,点
平面
.
![](https://img.xkw.com/dksih/QBM/2021/7/8/2759900325306368/2777778682167296/STEM/055aee96639749ab9bfe87ca48f553d5.png?resizew=482)
(1)求证:
平面
;
(2)
四点是否共面?给出结论,并给予证明;
(3)在翻折的过程中,设二面角
的平面角为
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/554f455de1180a8a6245b24ec9480a7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c4cd264c97c1f261229925cc5a6761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cf34605ceb15a969300a1121fc74f22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/946c16d99496d31ce4d87301a4793393.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c76e6c67644b8bad9bfe11c7ec3081d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7829855159327b2a87c3a424b3f7134a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a28d6477c85c5a4ac410a884e92fbe53.png)
![](https://img.xkw.com/dksih/QBM/2021/7/8/2759900325306368/2777778682167296/STEM/055aee96639749ab9bfe87ca48f553d5.png?resizew=482)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f235281692aa274a672d57fc400bd45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b12cffc313a181f666e3fc8e66b6f59.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45a8c036e6d2c152d0a16dbbe2bff905.png)
(3)在翻折的过程中,设二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1b43ff5a9a70210b4017c4c38b4258c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc24d605ad707ad0e76059d8a31f50d3.png)
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2021-08-02更新
|
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2卷引用:重庆市第八中学校2021-2022学年高一下学期第二次月考数学试题
名校
解题方法
9 . 如图,在正方体
中,
,
、
、
分别为
、
、
中点.
![](https://img.xkw.com/dksih/QBM/2021/7/10/2761063105978368/2762750064877568/STEM/71751841a9a24692b6a568b6f9bafd33.png?resizew=241)
(1)求证:
平面
;
(2)求异面直线
与
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://img.xkw.com/dksih/QBM/2021/7/10/2761063105978368/2762750064877568/STEM/71751841a9a24692b6a568b6f9bafd33.png?resizew=241)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84b859ca54ab085edf70c1179a7d103a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
(2)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
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2021-07-12更新
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2卷引用:重庆市青木关中学2021-2022学年高二上学期第三次月考数学试题
名校
解题方法
10 . 已知正方体
中,E为线段
上的一个动点(E可以与端点
、
重合),则下列结论中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfbc0b5a8fbde804bd8425a4b76d207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.png)
A.![]() |
B.![]() ![]() |
C.![]() ![]() ![]() ![]() |
D.三棱锥![]() |
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