1 . 如图,在棱长为1的正方体ABCD﹣A1B1C1D1中.
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572665558753280/1572665564209152/STEM/24ae96d2cee74671b2f398256cf6bc83.png?resizew=215)
(1)求证:AC⊥平面B1BDD1;
(2)求三棱锥B﹣ACB1体积.
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572665558753280/1572665564209152/STEM/24ae96d2cee74671b2f398256cf6bc83.png?resizew=215)
(1)求证:AC⊥平面B1BDD1;
(2)求三棱锥B﹣ACB1体积.
您最近一年使用:0次
2016-12-04更新
|
575次组卷
|
5卷引用:2015-2016学年湖南师大附中高二下期中理科数学试卷
解题方法
2 . 如图,在四面体
中,
,
,点
,
分别是
,
的中点.
(1)求证:直线
平面
;
(2)求证: 平面
平面
;
(3)若平面
平面
且
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a651eb577dbada1f29590e558d6f9fa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/650c6c818df102a83ce5159e3208d01a.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
(2)求证: 平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/557e120c066e17ba3eee00410cbed573.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
(3)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf6dc837ae85207789b94d109c5c2eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/946470cef32a0bd769b3809351d8ee61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67f207ea20f21ecde2abbfe27f4c94c6.png)
![](https://img.xkw.com/dksih/QBM/2016/7/28/1572945071775744/1572945077805056/STEM/a05c8d6e3f3e4c8f9fcb46950e8c827e.png?resizew=215)
您最近一年使用:0次
2016-12-04更新
|
824次组卷
|
3卷引用:2015-2016学年湖南省双峰一中高一下实验班选拔文科数学试卷
3 . 如图,在梯形
中,
,
,
,
、
分别是
、
上的点,
,
,沿将梯形翻折,使平面
平面
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/2017/2/8/1625058740813824/1625058741452800/STEM/83e58998c677470a874baab837d5d980.png)
(1)当
时,求证:
;
(2)当
变化时,求三棱锥
的体积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d3947804a878a87052c266be475423.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fcb0ab3b6099434e4cdde2ea871f3f1.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13bd9e8b54864ca44115d24a5aeeb83c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c30f73c718bde8352055a14987fc15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77d8c77f758b4a06c320be39ecb328f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e826b8202fa0e17245dcc68426c923a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/2017/2/8/1625058740813824/1625058741452800/STEM/83e58998c677470a874baab837d5d980.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03fcadd3ed6d1b8102d6260091e0bbdb.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13af0459cfe4630c72fba088a8fbb5fe.png)
您最近一年使用:0次
解题方法
4 . 如图,在几何体
中,四边形
均为边长为1的正方形.
![](https://img.xkw.com/dksih/QBM/2015/12/29/1572404543356928/1572404549353472/STEM/c645241bb25547df9749dc7b0146066e.png?resizew=139)
(1)求证:
.
(2)求该几何体的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4289e1de8e63d551280d449005b9803e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fb2c5bf948dc8b7aaa1a70c6c7dd48b.png)
![](https://img.xkw.com/dksih/QBM/2015/12/29/1572404543356928/1572404549353472/STEM/c645241bb25547df9749dc7b0146066e.png?resizew=139)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2d9cf089d6648a8e26d594528b784a.png)
(2)求该几何体的体积.
您最近一年使用:0次
9-10高二下·湖南长沙·阶段练习
名校
5 . 如图,边长为2的正方形
中,
![](https://img.xkw.com/dksih/QBM/2013/8/5/1571312589316096/1571312595156992/STEM/941463db55b84b5686975e8282e28a41.png)
(1)点
是
的中点,点
是
的中点,将
分别沿
折起,使
两点重合于点
.求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97789a3d3fe4addd9993883f3fd236dd.png)
(2)当
时,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/2013/8/5/1571312589316096/1571312595156992/STEM/941463db55b84b5686975e8282e28a41.png)
(1)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/2013/8/5/1571312589316096/1571312595156992/STEM/04df2b26421d4330bf083f4ca390333e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c818110255bdad691f61be6461a6fd73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/098a3e7d1f1890863b7483a98b618119.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4167feb456b79187e3582a90bdc0ffb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97789a3d3fe4addd9993883f3fd236dd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98c17cd29ed762fe6186073f762c9f96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a7c086de5c2691e9625ba9de4e8840a.png)
您最近一年使用:0次
2016-12-02更新
|
1640次组卷
|
6卷引用:湖南省长沙市一中2009—2010学年高二下学期第一次学业水平考试数学试题
(已下线)湖南省长沙市一中2009—2010学年高二下学期第一次学业水平考试数学试题湖南省长沙市长郡中学2018-2019学年高一下学期期末考试数学试题(已下线)2012-2013学年黑龙江省哈九中高一下学期期末考试数学试卷宁夏中卫市海原县第一中学2019-2020学年高一上学期期末数学试题四川省双流中学2018-2019学年高二下学期期中考试数学(文)试题四川省内江市威远县威远中学校2022-2023学年高二上学期期中数学文科试题
6 . 如图,在三棱锥
中,
.
![](https://img.xkw.com/dksih/QBM/2016/9/7/1573004456312832/1573004461760512/STEM/2b0b0bdc062d446bad6333c2c85303ab.png)
(Ⅰ)求证:
;
(Ⅱ)求三棱锥
的体积.
![](https://img.xkw.com/dksih/QBM/2016/9/7/1573004456312832/1573004461760512/STEM/404dc33059ad4b789729530b4c8ffb17.png)
![](https://img.xkw.com/dksih/QBM/2016/9/7/1573004456312832/1573004461760512/STEM/fe7ce458ad1c406bb9d472ebc18b6f58.png)
![](https://img.xkw.com/dksih/QBM/2016/9/7/1573004456312832/1573004461760512/STEM/2b0b0bdc062d446bad6333c2c85303ab.png)
(Ⅰ)求证:
![](https://img.xkw.com/dksih/QBM/2016/9/7/1573004456312832/1573004461760512/STEM/a01308ab32774397937e2ea60445d476.png)
(Ⅱ)求三棱锥
![](https://img.xkw.com/dksih/QBM/2016/9/7/1573004456312832/1573004461760512/STEM/404dc33059ad4b789729530b4c8ffb17.png)
您最近一年使用:0次
7 . 如图,在直角梯形
中,
,
,且
.现以
为一边向梯形外作矩形
,然后沿边
将矩形
翻折,使平面
与平面
垂直.
![](https://img.xkw.com/dksih/QBM/2016/1/15/1572439253786624/1572439260069888/STEM/eff40fb248cb4c99aacb598c13ffc27a.png)
(1)求证:
平面
;
(2)若点
到平面
的距离为
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34b0c4c783dd55685bd3e88bb31c6696.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74a9ba1546d2a265e9f57be11f0d635f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69e4fc0a2909fb2024ada132ed556dac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49a615892e6bde10b49082c8e1760884.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b693717f525facc79b9a500ed998b109.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bb42af6ab2718f31f3c139f65975889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b693717f525facc79b9a500ed998b109.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bb42af6ab2718f31f3c139f65975889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bb42af6ab2718f31f3c139f65975889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34b0c4c783dd55685bd3e88bb31c6696.png)
![](https://img.xkw.com/dksih/QBM/2016/1/15/1572439253786624/1572439260069888/STEM/eff40fb248cb4c99aacb598c13ffc27a.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d03e211c2e41c221a2977e2a349dc572.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d2eb50b211620dbee09bc517dadffa1.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f0b669ef4514f24ee09adeff7f41238.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26edf19551ce19b5c5e686c626aaa13a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f404f0573b369d1d5b8162fe27f7f42d.png)
您最近一年使用:0次
8 . 如图,四棱锥
中,底面
为矩形,
平面
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/2016/1/27/1572467881017344/1572467887087616/STEM/06a8bc97a7074e3dae587c4b8e2c9136.png)
(1)证明:
平面
;
(2)设二面角
为60°,
,求三棱锥
的体积.
![](https://img.xkw.com/dksih/QBM/2016/1/27/1572467881017344/1572467887087616/STEM/f82471c15d59447cbd638ba99f933bfb.png)
![](https://img.xkw.com/dksih/QBM/2016/1/27/1572467881017344/1572467887087616/STEM/7165f8d8869940bfb1a4cc07c63aba4e.png)
![](https://img.xkw.com/dksih/QBM/2016/1/27/1572467881017344/1572467887087616/STEM/7ac96d931c4141da8dbf74bc9d3d6714.png)
![](https://img.xkw.com/dksih/QBM/2016/1/27/1572467881017344/1572467887087616/STEM/7165f8d8869940bfb1a4cc07c63aba4e.png)
![](https://img.xkw.com/dksih/QBM/2016/1/27/1572467881017344/1572467887087616/STEM/e394c986a1ef4921908b4a1f13223b19.png)
![](https://img.xkw.com/dksih/QBM/2016/1/27/1572467881017344/1572467887087616/STEM/6a88325c80fa4f418486c3bd7c4866b7.png)
![](https://img.xkw.com/dksih/QBM/2016/1/27/1572467881017344/1572467887087616/STEM/06a8bc97a7074e3dae587c4b8e2c9136.png)
(1)证明:
![](https://img.xkw.com/dksih/QBM/2016/1/27/1572467881017344/1572467887087616/STEM/a6b529ad555e40ce8af045087402948f.png)
![](https://img.xkw.com/dksih/QBM/2016/1/27/1572467881017344/1572467887087616/STEM/b25821de8b2744ac8248ece04eaa784d.png)
(2)设二面角
![](https://img.xkw.com/dksih/QBM/2016/1/27/1572467881017344/1572467887087616/STEM/33d87fc1785549b6bb9dda2123511b39.png)
![](https://img.xkw.com/dksih/QBM/2016/1/27/1572467881017344/1572467887087616/STEM/6f76280cd0b247ab9e046a4c0a5bcc39.png)
![](https://img.xkw.com/dksih/QBM/2016/1/27/1572467881017344/1572467887087616/STEM/a53c519174194f62a1d4674ca0c4dba4.png)
您最近一年使用:0次
9 . 已知正四棱锥P-ABCD如图.
![](https://img.xkw.com/dksih/QBM/2015/10/10/1572255218425856/1572255224225792/STEM/808688cdcf1b4b8286e6d7374e6663d5.png)
(1)若其正视图是一个边长分别为
的等腰三角形,求其表面积S、体积V;
(2)设AB中点为M,PC中点为N,证明:MN//平面PAD.
![](https://img.xkw.com/dksih/QBM/2015/10/10/1572255218425856/1572255224225792/STEM/808688cdcf1b4b8286e6d7374e6663d5.png)
(1)若其正视图是一个边长分别为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc892d8e37014735d0f79e28238dd62e.png)
(2)设AB中点为M,PC中点为N,证明:MN//平面PAD.
您最近一年使用:0次
10 . 如图,在正方体
中,
为
的中点,
.
![](https://img.xkw.com/dksih/QBM/2016/10/18/1573077541863424/1573077547974656/STEM/1f9b86d54db441bba1932d3666109a4d.png?resizew=184)
(1)求证:
平面
;
(2)求三棱锥
的表面积和体积.
![](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/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://img.xkw.com/dksih/QBM/2016/10/18/1573077541863424/1573077547974656/STEM/1f9b86d54db441bba1932d3666109a4d.png?resizew=184)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f511b6f2e0072ff616a5b79b0617db7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af68a7bf0da4f7c6f739d2e2461ad9b7.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d904b0e1f54fde6f7822b478d8d85a9.png)
您最近一年使用:0次
2016-12-04更新
|
752次组卷
|
2卷引用:2015-2016学年湖南衡阳八中高二下期末数学(文)试卷