1 . 如图,在四棱锥
中,底面
为平行四边形,
,
,且
底面
.
(1)证明:
平面
;
(2)若
为
的中点,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/f80f51c31583fea58fde645474d60b8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c3f15f3725dc69af03fb68c639796c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2e40a351eff6e90e3008328eca0cc8f.png)
![](https://img.xkw.com/dksih/QBM/2018/12/20/2100947456917504/2101738830356480/STEM/ef4ab1ac2f6e47fbb843c96642db3601.png?resizew=366)
您最近一年使用:0次
2018-04-14更新
|
8095次组卷
|
9卷引用:江西省南昌市第二中学2019-2020学年高三第四次月考数学(文)试题
江西省南昌市第二中学2019-2020学年高三第四次月考数学(文)试题安徽省濉溪二中2018-2019学年高二下学期4月联考数学(文)试题海南省2018届高三第二次联合考试数学(文)试题【全国校级联考】湖北省孝感市重点高中协作体2017-2018学年高二下学期期末联考数学(文)试题安徽省六安市舒城中学2018届高三仿真(三)数学(文)试题【全国百强校】广东省汕头市金山中学2019届高三上学期期中考试数学(文)试题贵州省思南中学2019-2020学年高二上学期期末考试数学(文)试题吉林省通化县综合高级中学2020-2021学年高二上学期期末考试数学(理)试题吉林省通化县综合高级中学2020-2021学年高二上学期期末考试数学(文)试题
2 . 如图,已知四棱锥
中,
平面
,
,
,且
,
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/2018/4/8/1919738315579392/1921067454906368/STEM/f7e716de47f24177b1a0b5e4373edd43.png?resizew=178)
(1)求异面直线
与
所成角的大小;
(2)求点D到平面
的距离.
![](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/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb2dd10731b99c0f4f89ee957f8a239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c3b8822bbb5ba39c90550ac277cfe88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/2018/4/8/1919738315579392/1921067454906368/STEM/f7e716de47f24177b1a0b5e4373edd43.png?resizew=178)
(1)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
(2)求点D到平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
您最近一年使用:0次
3 . 如图,直三棱柱
中,
是
的中点.
![](https://img.xkw.com/dksih/QBM/2019/6/5/2218956987432960/2219118789582848/STEM/5f1f4dadd42545e39a37e48607251552.png?resizew=241)
(1)证明:
平面
;
(2)若
,
,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2019/6/5/2218956987432960/2219118789582848/STEM/5f1f4dadd42545e39a37e48607251552.png?resizew=241)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f5830646a912c3a916beac4f88c116b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/894b409d03ba95b3c3b9b573bcb18f6a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f865ef120b62d5064c7305547968c96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f144992e1cbee34868abce1e5ad38c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/894b409d03ba95b3c3b9b573bcb18f6a.png)
您最近一年使用:0次
2018-04-05更新
|
1541次组卷
|
5卷引用:江西省宜丰中学2019届高三上学期第二次月考文数试卷
4 . 在直三棱柱
中,
,
,
是棱
的中点.
![](https://img.xkw.com/dksih/QBM/2018/2/7/1877433043058688/1879120883458048/STEM/18248b1724b34dc495baba6438b2d898.png?resizew=138)
(1)求证:
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19bc7774144c164f7ebaeca54fa657e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92105835f8075cb75dff244e908370b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/2018/2/7/1877433043058688/1879120883458048/STEM/18248b1724b34dc495baba6438b2d898.png?resizew=138)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61a4aaaa9da904f086e1f5bf4e94eae4.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
您最近一年使用:0次
2018-02-10更新
|
494次组卷
|
3卷引用:江西省南昌市第二中学2017-2018学年高二下学期第一次月考数学(文)试题
名校
5 . 正方体
的棱长为1,
分别为
,
的中点,则点
到平面
的距离为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18a99be053c95aefbebe7460e50df572.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3f022b18f3b30bccee515df5e47ff00.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/15bc1be9d8b6de5e44156f8338da49a4.png)
您最近一年使用:0次
2018-02-09更新
|
267次组卷
|
2卷引用:江西省南昌市第二中学2017-2018学年高二下学期第一次月考数学(文)试题
6 . 如图,在四棱锥
中,底面
为菱形,
,
平面
,
,点
、
分别为
和
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/84d7cffb-173d-4511-a80c-e503b02e3a76.png?resizew=173)
(1)求证:直线
平面
;
(2)求点
到平面
的距离.
![](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/c6e0b64d25ddd18454f88e40c45d7d8f.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/3b610c9b9948d88eda8de0fb8d1cf972.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/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/84d7cffb-173d-4511-a80c-e503b02e3a76.png?resizew=173)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d46554105150391e671609fc6348a18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bf12905647aeeded72bbca21a63f319.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bf12905647aeeded72bbca21a63f319.png)
您最近一年使用:0次
2018-03-29更新
|
2753次组卷
|
11卷引用:江西省南昌市第三中学2021届高三上学期第四次月考考试数学试题
江西省南昌市第三中学2021届高三上学期第四次月考考试数学试题2019届福建省厦门市双十中学高三上学期第一次月考理科数学试题2020届宁夏银川市宁大附中高三上学期第四次月考数学(文)试题广东省佛山市第二中学2019-2020学年高二上学期第一次月考数学试题广西南宁市第三中学2020-2021学年高二12月月考数学(文)试题四川省成都市九校2017届高三下学期期中联考数学(文)试题重庆市第一中学2018届高三上学期期中考试数学(文)试题四川省德阳市2018届高三二诊考试文科数学试题【全国百强校】北师大实验中学2019届高三第二次模拟考试数学试题四川省泸州市泸县第五中学2019-2020学年高二下学期期中考试数学(文)试题四川省广元市宝轮中学2022-2023学年高二下学期第一次段考数学试题
7 . 如图,在三棱锥
中,平面
平面
,
为等边三角形,
且
,
为
的中点,点
在
上.
![](https://img.xkw.com/dksih/QBM/2017/8/17/1754071681318912/1754180075036672/STEM/171fd13db56d4deb951e76e12c90c30d.png?resizew=127)
(1)求证:平面
平面
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63ab13ef156d034b710d811e09b0be34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e9e5f1cfea3643c30c21732073a11ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3af4a22289b4d4575fbb838f09637416.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/2017/8/17/1754071681318912/1754180075036672/STEM/171fd13db56d4deb951e76e12c90c30d.png?resizew=127)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbf5269c5c16d69d41a3347c8cddba84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
2017-08-17更新
|
496次组卷
|
2卷引用:江西省宜春市上高二中2021-2022学年高二上学期9月第一次月考数学(文)试题
名校
8 . 长方体
中,底面
是边长为4的正方形,高为2,则顶点
到截面
的距离为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c6151468904c32d230da58dca8193a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fae7f4612c548b1f72a964ddb291cd2e.png)
![](https://img.xkw.com/dksih/QBM/2017/6/27/1718033143947264/1721725935075328/STEM/36b142c6ef19415cb4ffbd8383315801.png?resizew=164)
您最近一年使用:0次
2017-07-02更新
|
589次组卷
|
2卷引用:江西省玉山县第一中学2016-2017学年高二下学期第一次考试数学(理)试题
名校
9 . 如图,在矩形
中,已知
,点
、
分别在
、
上,且
,将四边形
沿
折起,使点
在平面
上的射影
在直线
上.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/16/b4c3b8c0-8fd8-49a0-9adc-5f9dfacbf86e.png?resizew=200)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/16/c50a888a-2cc0-4d88-acab-71a5346dd40a.png?resizew=175)
(1)求证:
;
(2)求点
到平面
的距离;
(3)求直线
与平面
所成的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/291c84f75f412b897e3162efb783dbd7.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc799080c04e01ce595151e11d957c96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bedde879f99aed69d745d5ec8fe62084.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/16/b4c3b8c0-8fd8-49a0-9adc-5f9dfacbf86e.png?resizew=200)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/16/c50a888a-2cc0-4d88-acab-71a5346dd40a.png?resizew=175)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0a0d2a2415ec1e1374ac46bc232f450.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
(3)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e41c2d7ae6aaf6d91129ed5221a415a7.png)
您最近一年使用:0次
2017-05-27更新
|
295次组卷
|
2卷引用:江西省瑞昌市第二中学2016-2017学年高二下学期第二次段考数学(理)试题
10 . 如图,四棱锥
中,平面
平面
,底面
为梯形,
,
,
,且
与
均为正三角形,
为
的重心.
![](https://img.xkw.com/dksih/QBM/2019/3/13/2159620014571520/2160200986836992/STEM/a7490d958fac45d5a7cee0628e3f7157.png?resizew=138)
(Ⅰ)求证:
平面
;
(Ⅱ)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07ac6208289b7346c73cde72e01004d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d0d5f57a40474205aee752e23ec449d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e2903ff33266528a7902ad51cf8d75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db5e1441a49e782ff0ef46e776cde06a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e2903ff33266528a7902ad51cf8d75.png)
![](https://img.xkw.com/dksih/QBM/2019/3/13/2159620014571520/2160200986836992/STEM/a7490d958fac45d5a7cee0628e3f7157.png?resizew=138)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf60ad9db3411f35704fa88d86bfef5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218054144a13435580cd132b9459546c.png)
(Ⅱ)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
2017-05-21更新
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1287次组卷
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3卷引用:江西省抚州临川市第二中学2020届高三上学期10月月考数学(文)试题