名校
1 . 如图,在四棱锥
中,底面
是矩形,
,
,
底面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/4543f909-17d5-427c-ba92-0b1894219849.png?resizew=151)
(1)当
为何值时,
平面
?证明你的结论;
(2)若在
边上至少存在一点
,使
,求
的取值范围.
![](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/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e781a2489271bfd1597cba1bb6f5887.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/4543f909-17d5-427c-ba92-0b1894219849.png?resizew=151)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5928c98b341b16d4b5a5b931d2929d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)若在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83abffb64a927cf133022dd88358e7a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2020-01-03更新
|
1685次组卷
|
6卷引用:四川省南充市高中2019-2020学年高三第一次高考适应性考试数学(文)试题
四川省南充市高中2019-2020学年高三第一次高考适应性考试数学(文)试题(已下线)专题4.5 立体几何中探索性问题-玩转压轴题,进军满分之2021高考数学选择题填空题(已下线)专题31 直线、平面垂直的判定与性质-1陕西省西安市铁一中学2022-2023学年高二上学期1月期末数学试题2023版 湘教版(2019) 必修第二册 过关斩将 第4章 专题强化练6 空间中的垂直关系(已下线)10.3 直线与平面间的位置关系(第2课时)(七大题型)(分层练习)-2023-2024学年高二数学同步精品课堂(沪教版2020必修第三册)
2 . 在三棱锥
中,
是正三角形,面
面
,
,
,
、
分别是
、
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/30730022-8bb8-4f02-b6dd-ab2c7626ef13.png?resizew=154)
(1)证明:
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78307cd417504554a4e2276fe24d1162.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55ca6072b3a2aac406a2b60bb7e01cde.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/3d4db9b82b67efe45a02fca32bfcf5dc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/30730022-8bb8-4f02-b6dd-ab2c7626ef13.png?resizew=154)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90fa715d27ae43ec1e157226bc9dea54.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a5df4b7ea378e4463e0d7846a9f783e.png)
您最近一年使用:0次
2020-01-02更新
|
385次组卷
|
2卷引用:湖南省湖湘教育三新探索协作体2019-2020学年高二上学期12月联考数学试题
3 . 已知四棱锥
中,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/0aa1ff10-4b04-47db-a92c-d57ff890854d.png?resizew=201)
(1)求证:
;
(2)若
为线段
的中点,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee7781452f71281b6eb7d6da04295d70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b9e64665f1080ea5ca8a587dec45527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2fe724734454d994d1e74b7b8a66e2a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/0aa1ff10-4b04-47db-a92c-d57ff890854d.png?resizew=201)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fe0bb7d51e559e73aa16a954fe7fa33.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2bc5e50b8dfa02601c70822252854a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a52554625aae170696e167edddc45b00.png)
您最近一年使用:0次
2019-12-27更新
|
283次组卷
|
3卷引用:百校联盟(全国I卷)2019-2020学年高三12月教育教学质量监测考试数学(文)试题
百校联盟(全国I卷)2019-2020学年高三12月教育教学质量监测考试数学(文)试题(已下线)2020届高三12月第03期(考点07)(文科)-《新题速递·数学》百校联盟2019-2020学年高三上学期教育教学质量监测考试文科数学
名校
4 . 在如图所示的几何体中,四边形
是等腰梯形
,
,
.在梯形
中,
,且
,
,
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/c5ad7d0c-2ce9-432a-ab88-30811e08a624.png?resizew=149)
(Ⅰ)求证:
.
(II)求四棱锥
与三棱锥
体积的比值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05740f0c6071846227dc0ec177ad15e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bf104481ef9b4675c733dbcc084b7b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd4b93d7abcfc4c3df48f03aa969c17f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66784e61bb8be33243a208895fc2ae08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3471bde9ec2c95cc301b4b3f468ca4aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe9131e7297c6c52cd962af9802f230b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f09ad78d4eccd1a9c9ccd3c4af79c79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/c5ad7d0c-2ce9-432a-ab88-30811e08a624.png?resizew=149)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31025539da369c563e8633f375146593.png)
(II)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8ae27f6390d9f1ff55c54350caac510.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f26712d1a7a5864cd18498f16f7bd96c.png)
您最近一年使用:0次
名校
5 . 如图
,四边形
中,
是
的中点,
,
,
,
,将(图
)沿直线
折起,使
(如图
).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/6ae528a3-ec8a-47ae-9fa1-a0dcc577d6c8.png?resizew=231)
(1)求证:
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b3bd7fcc7124307e9c33f98c53f2edf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e2a44d05b1d387150c4b359e021ffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19fc9f894312e55c87a0d6737080e233.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a65d5853c26657db448af610ac72cca4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b73d73869615fbaef5bf4fed0b2209c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/6ae528a3-ec8a-47ae-9fa1-a0dcc577d6c8.png?resizew=231)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53c51c25b65a37b676ae3c3b71c29f9b.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
您最近一年使用:0次
名校
6 . 如图,在正三棱柱
中,
为线段
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/db489e20-2563-4df9-8c9e-32875f628baf.png?resizew=220)
(1)求证:直线
平面
;
(2)设
为线段
上任意一点,在
内的平面区域(包括边界)是否存在点
,使
,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/db489e20-2563-4df9-8c9e-32875f628baf.png?resizew=220)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1496afecd92a619fbe5e9b736f06f4e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a935b7d21a103a264b6e96ecf82dbe4a.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60476ff27b009fae801d39d0d31a2f8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd5260b9927d0ad83b03c1e24c586e98.png)
您最近一年使用:0次
名校
7 . 如图所示,四棱锥
的底面是梯形,且
,
平面
,
是
中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/5fa2b772-e5a5-4a79-862e-36095c2b128e.png?resizew=193)
(1)求证:
;
(2)若
,
,求三棱锥
的高.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37591109b0a0ec5ffe2133f83310eca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b41b89ccb8296f8195f84832995d52dd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/5fa2b772-e5a5-4a79-862e-36095c2b128e.png?resizew=193)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f913298f0fae9f55377a8deab9f099dd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c33c6c34fad5aa1b14f4102d5b86e0ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1978b59fd41a7e45b66355645142aa4b.png)
您最近一年使用:0次
2019-12-17更新
|
429次组卷
|
2卷引用:湖南省长沙市第一中学、株洲二中等湘东七校2019-2020学年高三上学期12月月考数学(文)试题
8 . 如图,已知四边形
为梯形,
,
,四边形
为矩形,且平面
平面
,又
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/be665de8-fb59-4a20-b430-4866e2743145.png?resizew=188)
(1)求证:
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3be4e903f726661da71895b03e982a5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bbc56d42b003cbcb1fbe5c50e55b26b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c0db1f4f666a9be9ede868065a50997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f23bfbec3f97a797706e87a2d5a5938.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dbe4a746261639d50bb430620e4e3a7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/be665de8-fb59-4a20-b430-4866e2743145.png?resizew=188)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/408c0583576eb52299048703e3125367.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ae8768996ca9a0f2c5d9a19abbd54df.png)
您最近一年使用:0次
2019-12-16更新
|
362次组卷
|
2卷引用:2019年11月中学生标准学术能力诊断性测试测试文科数学试题(一卷)
9 . 如图,在长方体
中,
,
,点
在棱
上移动.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/ebb5f72f-1daf-45c9-a863-4325b2cff680.png?resizew=193)
(1)证明:
;
(2)求直线
与平面
所成的角;
(3)当
为
的中点时,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7d64fc81c857b124268609a8beb77b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/ebb5f72f-1daf-45c9-a863-4325b2cff680.png?resizew=193)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0fa81c1f81266b4ef3d471bc6bfc38d.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d8eb4a9f462ca0c1d49c3fe91e720d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(3)当
![](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/11990928efcd42ebe7a82a5f1105a708.png)
您最近一年使用:0次
2019-12-01更新
|
445次组卷
|
2卷引用:江苏省扬州市邗江中学2019-2020学年高一上学期期中数学试题(新疆班)
名校
10 . 如图,在三棱锥
中,平面
平面
,
为等边三角形,
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/10/89a56215-dea8-4ad9-a5bd-973f4ff03dc6.png?resizew=220)
(1)证明:
;
(2)若
,求二面角
平面角的余弦值.
![](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/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63ab13ef156d034b710d811e09b0be34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/10/89a56215-dea8-4ad9-a5bd-973f4ff03dc6.png?resizew=220)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4cd8ba7eb52e38857830162e770f534.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c3e9ef3e849788645552cfb0735d987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87aed767c861502aff771e6b0114746c.png)
您最近一年使用:0次
2019-11-21更新
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2370次组卷
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8卷引用:2019年11月四川省攀枝花市一模数学(理)试题