1 . 如图,
为圆锥的顶点,
为圆锥底面的圆心,
为底面直径,
为底面圆周上一点,
,四边形
为矩形,点
在
上,且
平面
.
![](https://img.xkw.com/dksih/QBM/2022/5/6/2973651645530112/2974963590799360/STEM/68b66aa8-c580-412a-8ce6-923d1ec1ca0c.png?resizew=289)
(1)请判断点
的位置并说明理由;
(2)平面
将多面体
分成两部分,求体积较大部分几何体的体积.
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cfe71b1bd5d58b604e0f1ff775fb92a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d2806aad4bdfa727f3d4150434ab055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a2b5cfae407016cad45bbdefea05833.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca48c18021e7be4bbb3e95576e1c1b5f.png)
![](https://img.xkw.com/dksih/QBM/2022/5/6/2973651645530112/2974963590799360/STEM/68b66aa8-c580-412a-8ce6-923d1ec1ca0c.png?resizew=289)
(1)请判断点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(2)平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c761098c711ffc8ad047a6867d2a268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18145e24844c08cb2cc05f69cfbb1c5a.png)
您最近一年使用:0次
2022-05-08更新
|
1085次组卷
|
3卷引用:河南省洛阳市2022届高三第三次统一考试数学(文科)试题
名校
2 . 如图,在四棱锥
中,底面
正方形,平面
底面
,平面
底面
,
,
分别是
的中点,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/16/dff7d99f-8875-4564-93ce-c46cc758ab86.png?resizew=173)
(1)证明:
平面
;
(2)求
与平面
所成角的正弦值.
![](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/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36dc88c2054948a03e74d57b10d3a482.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e658d7985a600629fdf01517fc55c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67576cc7b83ee93cfd15154bb2a00c5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/16/dff7d99f-8875-4564-93ce-c46cc758ab86.png?resizew=173)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96b8c2721ada247b03f41f328539b301.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
您最近一年使用:0次
2022-09-16更新
|
1100次组卷
|
4卷引用:广东省汕头市金山中学2023届高三上学期摸底考试数学试题
3 . 在正三棱锥
中,O,E,F分别是线段AC,AD,BD的中点,G是OC的中点,且
.
![](https://img.xkw.com/dksih/QBM/2022/5/13/2978458749018112/2981260636577792/STEM/f1a094eb-79b7-4c26-b9e8-a9f5de30ded7.png?resizew=286)
(1)在BC上是否存在一点H?使得平面
平面BOE;
(2)若点M是FG的靠近点F的三等分点,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f443adba65bafc6afe4de77820c31528.png)
![](https://img.xkw.com/dksih/QBM/2022/5/13/2978458749018112/2981260636577792/STEM/f1a094eb-79b7-4c26-b9e8-a9f5de30ded7.png?resizew=286)
(1)在BC上是否存在一点H?使得平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61a5831bd2d949ed609b0f0fd68d0729.png)
(2)若点M是FG的靠近点F的三等分点,求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fd35eb631ea35264765e8a0799e15d9.png)
您最近一年使用:0次
2022-05-17更新
|
1111次组卷
|
3卷引用:重庆市巴蜀中学校2021-2022学年高一下学期期中数学试题
重庆市巴蜀中学校2021-2022学年高一下学期期中数学试题山西省晋中市新大陆双语学校2021-2022学年高一下学期5月月考数学试题(已下线)第08练 点线面的位置关系-2022年【暑假分层作业】高一数学(苏教版2019必修第二册)
2023·全国·模拟预测
名校
4 . 如图,在几何体
中,四边形
是等腰梯形,四边形
是正方形,且平面
平面
,
,
,
,
分别是
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/3/51a8607c-f813-4542-a255-980b66e23460.png?resizew=122)
(1)证明:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb5a68a008a22d5a8cea5fe8dcf31e10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5f58d0919b618868df14add12c59ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d28eb567698a9467890bfaebb49c248.png)
![](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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/3/51a8607c-f813-4542-a255-980b66e23460.png?resizew=122)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52bfb639ad02a425d8e67ab046088ff5.png)
您最近一年使用:0次
2023-05-01更新
|
467次组卷
|
3卷引用:2023年高三数学(理)押题卷三
名校
5 . 如图,在直三棱柱
中,
,
,
,D,E分别是棱
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/27/f4501acf-20c5-4023-af7b-05365e74a399.png?resizew=131)
(1)证明:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7ad3a578f403b9e6b97fa2dc955fc11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/27/f4501acf-20c5-4023-af7b-05365e74a399.png?resizew=131)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31c34b18525831f3eda7bb90be0199b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a935b7d21a103a264b6e96ecf82dbe4a.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d7cc17970a0e1e684e13414bf4d054a.png)
您最近一年使用:0次
2023-03-26更新
|
473次组卷
|
4卷引用:陕西省部分名校2023届高三下学期高考仿真模拟理科数学试题
2023高三·全国·专题练习
解题方法
6 . 如图,在三棱锥
中,
,
,
为点
在平面
上的射影,
为
的中点.证明:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c41ffdaecfb3c73d403179e5745c71a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1326e85ff750d882de9ea65c29e3d3b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6287c16246f1c50ea26efc09040333ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
您最近一年使用:0次
解题方法
7 . 如图,在正方体
中,
,
分别为棱
,
的中点,
是线段
上的动点.证明:
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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfbc0b5a8fbde804bd8425a4b76d207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89006cac018a9875f65ed7bd429c61bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ae8768996ca9a0f2c5d9a19abbd54df.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55e4efb8e1bf4b3a121d4eb0eacf4d26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ae8768996ca9a0f2c5d9a19abbd54df.png)
您最近一年使用:0次
2023-07-08更新
|
458次组卷
|
4卷引用:广东省汕尾市2022-2023学年高一下学期期末数学试题
广东省汕尾市2022-2023学年高一下学期期末数学试题(已下线)专题19 平面与平面平行-《重难点题型·高分突破》(人教A版2019必修第二册)(已下线)8.5.3 平面与平面平行-同步题型分类归纳讲与练(人教A版2019必修第二册)【人教A版(2019)】专题14立体几何与空间向量(第三部分)-高一下学期名校期末好题汇编
2022高三·全国·专题练习
解题方法
8 . 如图、三棱柱
的侧棱
垂直于底面
,
是边长为2的正三角形,
,点
在线段
上且
,点
是线段
上的动点.当
为多少时,直线
平面
?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ca594439ed07a1786b611ebd724d2b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b12f28117a52dc0ee6941639196a700.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94bb1444ba1c40f16037cc56c62a1f79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/063510e3c1fb6a7ccc3b8e3e3c7d660e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/24/3c57f831-891a-4c95-bb63-a3afe64a66a1.png?resizew=173)
您最近一年使用:0次
2020高三·全国·专题练习
解题方法
9 . 如图,三棱锥
中,
是
的中点,
是
的中点,点
在
上且
,证明:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b29c3e63918ec59901c3b44087c9afd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/eae0554e-fdfe-4728-8fe3-d9f80bc49591.png?resizew=182)
您最近一年使用:0次
名校
10 . 如图,在三棱柱
中,
⊥平面
,
,
是等边三角形,
分别是棱
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/10/d410b7a2-c900-446c-8623-f741d086e92a.png?resizew=142)
(1)证明:
平面
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b23cf5055a5bef45fa9e99719470d3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/927456b0989846a2f1573844bbaa2105.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860711d30d762a7398d33ddd2156b880.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/10/d410b7a2-c900-446c-8623-f741d086e92a.png?resizew=142)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df6a3413b77478c8d4e1e0389dbf5984.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bff3ccea5989c60e51e321af3f53f54.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bff3ccea5989c60e51e321af3f53f54.png)
您最近一年使用:0次
2023-02-10更新
|
455次组卷
|
2卷引用:河北省邢台市2023届高三上学期期末数学试题