名校
1 . 如图,在四棱锥
中,
平面
,底面
是直角梯形,其中
,
,
,
,E为棱
上的点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/19/539de07f-0b4b-4cc1-9bcd-10da86d0f8a4.png?resizew=154)
(1)若F为棱
的中点,求证:
平面
;
(2)(i)求证
平面
;
(ii)设Q为棱
上的点(不与C,P重合),且直线
与平面
所成角的正弦值为
,求
的值.
![](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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abfb2735e1683a6ae86b5b97a0032e4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab2c27eac56fffa4cd7dbe1dcdf1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b41744ec71119e7264ef9673a35805a8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/19/539de07f-0b4b-4cc1-9bcd-10da86d0f8a4.png?resizew=154)
(1)若F为棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)(i)求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(ii)设Q为棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf3d566704b44ea4ef1f99c37bd46902.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dee14db57f0c762aad845cf5b4a243c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2942447b6af4f2749668439d5ee03a7.png)
您最近一年使用:0次
2021-04-11更新
|
1104次组卷
|
4卷引用:北京市清华大学附属中学2020-2021学年高二上学期期末考试数学试题
北京市清华大学附属中学2020-2021学年高二上学期期末考试数学试题天津市耀华中学2022届高三暑假线上调研数学试题(已下线)专题02 空间向量与立体几何的典型题(二)-【尖子生专用】2021-2022学年高二数学考点培优训练(人教A版2019选择性必修第一册)(已下线)一轮复习大题专练50—立体几何(线面角2)—2022届高三数学一轮复习
2 . 如图,正方体
中,
,
分别是
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/27/ffb9022c-a36a-471f-946f-17b15ff07691.png?resizew=164)
(1)求直线
和平面
所成的角大小;
(2)求证:
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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/27/ffb9022c-a36a-471f-946f-17b15ff07691.png?resizew=164)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
您最近一年使用:0次
3 . 设某几何体的三视图如图(尺寸的长度单位为
),
![](https://img.xkw.com/dksih/QBM/2021/2/24/2664966744375296/2667903068471296/STEM/c5d7b5ce-3816-452c-917a-f4603a165408.png)
(1)用斜二测画法画出该几何体的直观图(不写画法);
(2)求该几何体最长的棱长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
![](https://img.xkw.com/dksih/QBM/2021/2/24/2664966744375296/2667903068471296/STEM/c5d7b5ce-3816-452c-917a-f4603a165408.png)
(1)用斜二测画法画出该几何体的直观图(不写画法);
(2)求该几何体最长的棱长.
您最近一年使用:0次
解题方法
4 . 如图,在底面为平行四边形的四棱锥
中,PA⊥平面ABCD,AC⊥CD,且AB=PA,点E,F分别是PD,PB的中点.
![](https://img.xkw.com/dksih/QBM/2021/2/24/2664863913410560/2667072958160896/STEM/93ef5610-6aac-4242-bdc2-143c41698907.png)
证明:(1)PB
平面AEC;
(2)平面AFC⊥平面AEC.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://img.xkw.com/dksih/QBM/2021/2/24/2664863913410560/2667072958160896/STEM/93ef5610-6aac-4242-bdc2-143c41698907.png)
证明:(1)PB
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
(2)平面AFC⊥平面AEC.
您最近一年使用:0次
2021-02-27更新
|
863次组卷
|
2卷引用:陕西省西安市新城区2020-2021学年高一上学期期末数学试题
解题方法
5 . 如图
,在四边形
中,
,
,
,
,
,
是
上的点,
.将
沿
折起到
的位置,且
,如图
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/ff37e6e3-dcfb-4f31-8c96-a1ca5c3f5b8a.png?resizew=511)
(1)求证:平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/923189afc198d153c79059a827f63c87.png)
平面
;
(2)若
为线段
上任一点,求直线
与平面
所成角的正弦值的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4aa304ff4cc72b9bf6a2fe091740f75.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/ce0d7095ddd69d6ceaf1065b1bc2c79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077c956ac0eb05cf120e14f17413dfa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267ace52b64e1e7dfc5211e033255b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/940099db7ffe6b3f7e70afcfba66750a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc3814287dbb60d478bffc5366f9928b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b04e2f190be01e1ae0a21eb44e4dce83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/502fc5e3c7f636aac9064ec69018c95c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/ff37e6e3-dcfb-4f31-8c96-a1ca5c3f5b8a.png?resizew=511)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/923189afc198d153c79059a827f63c87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/800c5e266b4ad8462a46970f0a232d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74bca84ad86c648d3bb20c8909c8da3f.png)
您最近一年使用:0次
6 . 如图,正三棱柱
的棱长均为2,M是侧棱
的中点.
![](https://img.xkw.com/dksih/QBM/2021/1/27/2645119770124288/2646380397133824/STEM/0766a3e036e8467893520be4d4760d26.png?resizew=199)
(1)在图中作出平面
与平面
的交线l(简要说明),并证明
平面
;
(2)求平面
与平面
所成二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://img.xkw.com/dksih/QBM/2021/1/27/2645119770124288/2646380397133824/STEM/0766a3e036e8467893520be4d4760d26.png?resizew=199)
(1)在图中作出平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fed2f706801662432b68797e72647c6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9df740160690029ac1e730c85f20347.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee8b5a6dbcf05f572f83f51abf7d668c.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fed2f706801662432b68797e72647c6e.png)
您最近一年使用:0次
2021-01-29更新
|
977次组卷
|
2卷引用:贵州省贵阳市2021届高三上学期期末检测考试数学(理)试题
7 . 如图,四边形
为菱形,O为
与
的交点,
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/24/c330dabe-0d2b-4c9b-ab62-03ea6f77505f.png?resizew=142)
(1)求证:平面
平面
;
(2)若
,求
与平面
所成角的正弦值;
(3)若
,三棱锥
的体积为
,求三棱锥
的侧面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/662698361c6b3ddaf0c28a3c87be53e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/24/c330dabe-0d2b-4c9b-ab62-03ea6f77505f.png?resizew=142)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4a46fbde58e12b1edc038ae9e921722.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/926584088b939200d88e64318f2d4e6c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa99c9e32c26c441503d4e7794178c1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46e2da608b66c9aee03e2503388ba4fd.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bb8837a125041127658ef850e6656ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51f73a0ca4e6c794242489066fddb6c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b565e518d475a50358fedff2f0bb8dec.png)
您最近一年使用:0次
名校
解题方法
8 . 如图,在三棱锥
中,
,
,
,点D,E分别为AB,PC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/b9c316ae-b5d1-4dbf-a6d0-c9a3d7d785b4.png?resizew=200)
(1)证明:
平面ABC;
(2)设点F在线段BC上,且
,若三棱锥
的体积为
,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f14f698605a196cf83ccba6a601d0e2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/922118e5e548bd7ff2ed1e8e46f6b041.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/b9c316ae-b5d1-4dbf-a6d0-c9a3d7d785b4.png?resizew=200)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
(2)设点F在线段BC上,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47a23b226252730b5902ec96685b0a5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b115316e0fcd2ef46a4dd383472996e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fd7b7834f33ed54661f2ce4328f661a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
2021-01-28更新
|
427次组卷
|
4卷引用:山西省太原市2021届高三上学期期末数学(文)试题
9 . 如图,在三棱锥
中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6101853bc57c90c94ac553455a580710.png)
![](https://img.xkw.com/dksih/QBM/2021/1/25/2643909326340096/2645126644228096/STEM/9b2aad83-64f9-4769-8a7d-e53f52382314.png)
(1)证明:平面
平面
.
(2)在侧面
内求作一点H,使得
平面
,写出作法(无需证明),并求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6101853bc57c90c94ac553455a580710.png)
![](https://img.xkw.com/dksih/QBM/2021/1/25/2643909326340096/2645126644228096/STEM/9b2aad83-64f9-4769-8a7d-e53f52382314.png)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
(2)在侧面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39748bd3de9c56dfbe313e65645db6dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
您最近一年使用:0次
2021-01-27更新
|
697次组卷
|
6卷引用:安徽省阜阳市2020-2021学年高三上学期教学质量统测文科数学试题
名校
10 . 如图,正方形
边长为1,
平面
,
平面
,且
(
,
在平面
同侧),
为线段
上的动点.
![](https://img.xkw.com/dksih/QBM/2021/1/18/2638808354422784/2642328507834368/STEM/bbd7bebc-2cd6-4f07-aee5-0d10dca45333.png?resizew=268)
(1)求证:
;
(2)求
的最小值,并求取得最小值时二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7a38e6c6dfde2b19b6b47f35a439a06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1d3de310412c0fa445acd2cdb61513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccc1ce55b1e716fa536a5ec300e2725f.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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://img.xkw.com/dksih/QBM/2021/1/18/2638808354422784/2642328507834368/STEM/bbd7bebc-2cd6-4f07-aee5-0d10dca45333.png?resizew=268)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e37a450636672d5a6b202d42aa3a1f51.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82392ad71d81c40b6c0f0f996dcc9fa6.png)
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2021-01-23更新
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2卷引用:辽宁省大连市2020-2021学年高二上学期期末数学试题