如图,在四棱锥
中,
是正方形,
平面
,
,
分别是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/20/329a7886-1b8c-4868-80a5-a789935fbd61.png?resizew=176)
(1)求证:平面
平面
;
(2)在线段
上确定一点
,使
平面
,并给出证明.
![](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/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99926bf272cd757f0985c69b390ebcce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b199a99e53d67ff4abf233930961a29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e3a25299c121dbb883fd3c7918d566d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/20/329a7886-1b8c-4868-80a5-a789935fbd61.png?resizew=176)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a281c31b6e501123442d141860908a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe8a84ca3a13f82aff1a022edc66065.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5d8073385db872410ca88187bbb0d34.png)
15-16高二上·贵州遵义·期中 查看更多[2]
更新时间:2016-12-03 22:20:37
|
相似题推荐
解答题-证明题
|
适中
(0.64)
【推荐1】如图,一个侧棱长为
的直三棱柱
容器中盛有液体(不计容器厚度).若液面恰好分别过棱
中点
.
![](https://img.xkw.com/dksih/QBM/2016/10/18/1573076038017024/1573076043431936/STEM/e1eb5a88-86ff-4a9f-8bb4-525a37576c9a.png?resizew=313)
(1)求证:平面
平面
;
(2)当底面
水平放置时,求液面的高.
![](https://img.xkw.com/dksih/QBM/2016/10/18/1573076038017024/1573076043431936/STEM/46fb9827ad0b48e98fab79d4435106b3.png)
![](https://img.xkw.com/dksih/QBM/2016/10/18/1573076038017024/1573076043431936/STEM/1ef473af9ace4ee5914c1ad653b1190d.png)
![](https://img.xkw.com/dksih/QBM/2016/10/18/1573076038017024/1573076043431936/STEM/f9fef578d65543a493d74b8b38faa2ad.png)
![](https://img.xkw.com/dksih/QBM/2016/10/18/1573076038017024/1573076043431936/STEM/9b546ad887a647a5a34018c9d2ed785c.png)
![](https://img.xkw.com/dksih/QBM/2016/10/18/1573076038017024/1573076043431936/STEM/e1eb5a88-86ff-4a9f-8bb4-525a37576c9a.png?resizew=313)
(1)求证:平面
![](https://img.xkw.com/dksih/QBM/2016/10/18/1573076038017024/1573076043431936/STEM/9895a5b316df4c11a2384b163ef62e11.png)
![](https://img.xkw.com/dksih/QBM/2016/10/18/1573076038017024/1573076043431936/STEM/0b681df5a0d740dda6fe7c46782ca554.png)
(2)当底面
![](https://img.xkw.com/dksih/QBM/2016/10/18/1573076038017024/1573076043431936/STEM/e4744a1d369b463ea1649b21ec16baba.png)
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名校
【推荐2】如图,已知
是平行四边形
所在平面外一点,
分别是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/17/f8cd1750-e47f-47bf-9fc5-1d523b31b4ae.png?resizew=177)
(1)求证:
平面
;
(2)若
,
,求异面直线
与
所成的角的大小.
![](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/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fbb19cb4eb2d7f3207559eb07355ba2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/17/f8cd1750-e47f-47bf-9fc5-1d523b31b4ae.png?resizew=177)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b8a1e931bbffbec0ecc5ab04156b5d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f4ff82b837e4d920ee0482796e7dad7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】如图,在三棱柱ABC—
中,点D是BC的中点,欲过点
作一截面与平面A
平行,问应当怎样画线,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f972f06f20dd32011d093b39b1c83b7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/778e18952da928a6a6e5bdf544ce2c58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec4b967a08888e1b9ae08fe0b1ed72c1.png)
![](https://img.xkw.com/dksih/QBM/2012/1/9/1570681539452928/1570681544712192/STEM/dace95e2eba04eb1a7b3f4fe34c07f9c.png?resizew=161)
您最近一年使用:0次
解答题-证明题
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适中
(0.65)
解题方法
【推荐2】如图,四棱柱
的底面
为正方形,
为
的中点,
,求证:平面
∥平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f7989987e76fe40de8b7533a22912a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95196d4658088f565e495c005cfed5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935fe3125f247b7bea4f065ce9ad985.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f7989987e76fe40de8b7533a22912a2.png)
![](https://img.xkw.com/dksih/QBM/2022/8/19/3048101419761664/3048728537751552/STEM/6f6b382c54104374ba6ee123c3351fa5.png?resizew=293)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
解题方法
【推荐1】如图,圆柱的轴截面ABCD是边长为2的正方形,点E在底面圆周上,
,F为垂足.
(1)求证:
.
(2)当直线DE与平面ABE所成角的正切值为2时,求点B到平面CDE的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/876bb8ce0ca53475fa091ffd18bdc94a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/26/9a09b367-8578-426f-9c17-24dae89f5940.png?resizew=131)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3e3d90003d6940c8e9e90916172ba97.png)
(2)当直线DE与平面ABE所成角的正切值为2时,求点B到平面CDE的距离.
您最近一年使用:0次
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【推荐2】如下图,在三棱柱
中,
底面
,
,
,
,
是棱
上一点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/17/15f1e105-5df7-41d2-a90e-3063ea544383.png?resizew=148)
(1)求证:
.
(2)若
,
分别是
,
的中点,求证:
∥平面
.
(3)若二面角
的大小为
,求线段
的长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a8bfe2553e852df73185d017c0a62fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/209acf15985d1ea1ad86fc4a37e38c0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080ca48cd27d4bf9d9ef084b558fc17a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d8cb98c0adee7ca698d8b17dacb845b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/17/15f1e105-5df7-41d2-a90e-3063ea544383.png?resizew=148)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/736eca86008d535f03500d32ac00cd46.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/770b4f16694b2bd79a1a93d776a82680.png)
(3)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b47e1c873095436979db814ea9de44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15615de1a6df206dbd081251f676578e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19ef601ca1f9c4c031adab4ffed297f0.png)
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解答题-问答题
|
适中
(0.65)
【推荐1】如图,三棱柱
中,侧面
为菱形,
的中点为
,且
平面
.
![](https://img.xkw.com/dksih/QBM/2014/6/23/1571793193443328/1571793199333376/STEM/0d50fed864b04a2c87f88f57849d061c.png?resizew=365)
(1)证明:
;
(2)若
,
,
,求三棱柱
的高.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ce03b310edce42191f9fa75a1c909ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://img.xkw.com/dksih/QBM/2014/6/23/1571793193443328/1571793199333376/STEM/0d50fed864b04a2c87f88f57849d061c.png?resizew=365)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8db87b41df9d3c83d2810a4265d768d3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c7fd49bb962841b4575805030e19add.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f2e238b2757353026133bbe495645e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
解题方法
【推荐2】如图,在正四棱锥
中,侧棱长为
,底面边长为2,点E,F分别为CD,CB中点.求证:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/1/cfd8f1c9-3cd6-4c58-ad74-5a2b66709ec9.png?resizew=213)
(1)
;
(2)平面
平面PBC.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/1/cfd8f1c9-3cd6-4c58-ad74-5a2b66709ec9.png?resizew=213)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc6269077b8e6b063efb583c91a564d.png)
(2)平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
您最近一年使用:0次