1 . 三棱柱
中,
,
,
,四边形
为菱形,且
,
.
![](https://img.xkw.com/dksih/QBM/2020/6/28/2494654468399104/2495009112178688/STEM/0a3e6236-0e1f-43d5-a2c2-aae0b5f37c35.png?resizew=242)
(1)求证:平面
平面
;
(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/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f144992e1cbee34868abce1e5ad38c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d2530339ae0ed2d1e463822807e433.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a91b02ae9df63950c2b4152fd1edc091.png)
![](https://img.xkw.com/dksih/QBM/2020/6/28/2494654468399104/2495009112178688/STEM/0a3e6236-0e1f-43d5-a2c2-aae0b5f37c35.png?resizew=242)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85a2e10a5aebe40a9018d5ee3ade7af8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
解题方法
2 . 在三棱锥
中,
平面
,
为
的中点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/11/32ded868-f4eb-4c5b-a775-610efa1c61b2.png?resizew=146)
(1)证明:
平面
.
(2)若
,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92a3680ec97ccbb82b6e1ff78ac10b7c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/11/32ded868-f4eb-4c5b-a775-610efa1c61b2.png?resizew=146)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98e4e887f25b10f9f1833fe4fb355b39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64eb31601464364be2baf4aa87404bcd.png)
您最近一年使用:0次
2020-06-29更新
|
696次组卷
|
5卷引用:江西省大联考2020届高三6月数学试卷 (文科)试题
解题方法
3 . 已知棱长为
的正方体
中,
分别为棱
和
的中点.
![](https://img.xkw.com/dksih/QBM/2020/6/18/2487519932588032/2488855060398080/STEM/730d877126864ea899556acb0aa4851e.png?resizew=182)
(1)证明:
平面
;
(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/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b7fa1c1d6321b28a2a2b7ffd0b27253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d470a5f9c2676243d595845b24c7ac95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d8eb4a9f462ca0c1d49c3fe91e720d.png)
![](https://img.xkw.com/dksih/QBM/2020/6/18/2487519932588032/2488855060398080/STEM/730d877126864ea899556acb0aa4851e.png?resizew=182)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7592c4f01c8e06c7ee90df5b9413a9f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1f68454096da710903e9693c7f2015.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1f68454096da710903e9693c7f2015.png)
您最近一年使用:0次
4 . 如图所示,梯形
中,
,平面
平面
,且四边形
为矩形,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2020/6/18/2487460573790208/2488060332752896/STEM/e08a17b2-4f6e-4c33-973f-d1a15440c23e.png)
(1)求证:
平面
;
(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/f571396be1aa4a8914a66f7d7abd6381.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/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7ea9d92e5c258a50af1e461c7388894.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0524c3287106a4460858ed3926989a4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af32ecdc0dc2f1a60b47f3311a0587d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71aa812f83d86aaf308244a9afc09322.png)
![](https://img.xkw.com/dksih/QBM/2020/6/18/2487460573790208/2488060332752896/STEM/e08a17b2-4f6e-4c33-973f-d1a15440c23e.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
您最近一年使用:0次
2020-06-19更新
|
995次组卷
|
5卷引用:2020届广东省珠海市高三三模数学(文)试题
名校
解题方法
5 . 如图,正方体
,点
为对角线
上的点,当点
由点
向点
运动过程中,下列说法正确的是
![](https://img.xkw.com/dksih/QBM/2020/6/18/2487460573790208/2488060332654592/STEM/d0202c5d059a45f3b2b4402506d670b7.png?resizew=144)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://img.xkw.com/dksih/QBM/2020/6/18/2487460573790208/2488060332654592/STEM/d0202c5d059a45f3b2b4402506d670b7.png?resizew=144)
A.![]() |
B.![]() |
C.![]() ![]() |
D.点![]() ![]() |
您最近一年使用:0次
2020-06-19更新
|
671次组卷
|
3卷引用:2020届广东省珠海市高三三模数学(文)试题
6 . 已知正
边长为3,点
,
分别是
,
边上的点,
,如图1所示.将
沿
折起到
的位置,使线段
长为
,连接
,如图2所示.
![](https://img.xkw.com/dksih/QBM/2020/6/8/2480354744786944/2480858852745216/STEM/d059f18875ab47d397146c53ea436711.png?resizew=177)
![](https://img.xkw.com/dksih/QBM/2020/6/8/2480354744786944/2480858852745216/STEM/8563b563603145b5927a12d3e8babb4b.png?resizew=209)
(Ⅰ)求证:平面
平面
;
(Ⅱ)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b17e45335cdf9c6af7e4706e731b32a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ed4c4e8edbd179f3fc38a6653f18c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/2020/6/8/2480354744786944/2480858852745216/STEM/d059f18875ab47d397146c53ea436711.png?resizew=177)
![](https://img.xkw.com/dksih/QBM/2020/6/8/2480354744786944/2480858852745216/STEM/8563b563603145b5927a12d3e8babb4b.png?resizew=209)
(Ⅰ)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9ab73fd4ddacc0c1524f8d742c7dcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7af6b531f532eb39c26d36e9dd97254d.png)
(Ⅱ)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bff36d9348c57fd55644d5d748aa8e18.png)
您最近一年使用:0次
2020-06-09更新
|
350次组卷
|
3卷引用:江西省九江市2020届高三第三次模拟考试文科数学试题
7 . 如图,在四棱锥
中,底面
是边长为
的菱形,
是正三角形,且
为
的中点,
为
的中点,
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/9d2235b3-a573-4a63-b0c8-c5516a2fbb1c.png?resizew=254)
(1)证明:平面
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/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/662698361c6b3ddaf0c28a3c87be53e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/9d2235b3-a573-4a63-b0c8-c5516a2fbb1c.png?resizew=254)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78a3fd5284e160896f07ce367645fd04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4739ad948445af72d585fe29c745929b.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09d9d486b7f91ba933210dd013a7f2c.png)
您最近一年使用:0次
名校
解题方法
8 . 如图1所示在菱形ABCD中,
,
,点E是AD的中点,将
沿BE折起,使得平面
平面BCDE得到如图2所示的四棱锥
,点F为AC的中点.在图2中
![](https://img.xkw.com/dksih/QBM/2020/5/21/2467729580007424/2470392237105152/STEM/55a81740-cb9b-463c-96dc-78d7fc4a243b.png)
(Ⅰ)证明:
平面ABE;
(Ⅱ)求点A到平面BEF的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4f5eec0addba78f2e0cdfb7ecc59a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed5f0cfc1049f84a04c81bd213afb8d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5164a3cc47e266446d49127e2ef10c37.png)
![](https://img.xkw.com/dksih/QBM/2020/5/21/2467729580007424/2470392237105152/STEM/55a81740-cb9b-463c-96dc-78d7fc4a243b.png)
(Ⅰ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40f44f2b2f82a9126223138972850aa2.png)
(Ⅱ)求点A到平面BEF的距离.
您最近一年使用:0次
2020-05-25更新
|
398次组卷
|
3卷引用:江西省临川二中、临川二中实验学校2020届高三第二次模拟考试文科数学试题
解题方法
9 . 在如图所示的多面体中,平面
垂直于以
为直径的半圆面,
为
上一点,
,
,
.
![](https://img.xkw.com/dksih/QBM/2020/5/4/2455712498843648/2457599813337088/STEM/472d7ef98b114dcf9a1b6eea62933c54.png?resizew=197)
(1)若点
是线段
的中点,求证:
平面
;
(2)若点
为
的中点,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1d70676406f26d339465fe3473c0c05.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/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e20b970f3b0dc1c9a3de6eb09beead.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9060f03b9ee41d70d135b1e1a8902ce9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1822a1725b8797343a6615378356d91c.png)
![](https://img.xkw.com/dksih/QBM/2020/5/4/2455712498843648/2457599813337088/STEM/472d7ef98b114dcf9a1b6eea62933c54.png?resizew=197)
(1)若点
![](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/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
您最近一年使用:0次
2020-05-07更新
|
167次组卷
|
3卷引用:江西省赣州市2019-2020学年高三年级摸底考试数学(文)试题
江西省赣州市2019-2020学年高三年级摸底考试数学(文)试题(已下线)【南昌新东方】 江西省南昌市新建一中2020-2021学年高三上学期10月第一次月考数学(文)试题江西省南昌市新建县第一中学2021届高三第一次月考数学文科试题
解题方法
10 . 如图,正方体
的棱长为
,点
、
为棱
、
的中点.
![](https://img.xkw.com/dksih/QBM/2020/4/26/2449798289408000/2450436423729152/STEM/69b52571e55c412dad4f29de4666e242.png?resizew=220)
(1)求证:
平面
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e19d1a7e89beddaf468bdce5e31550e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e737bc35da650eda3825d29799b5f86f.png)
![](https://img.xkw.com/dksih/QBM/2020/4/26/2449798289408000/2450436423729152/STEM/69b52571e55c412dad4f29de4666e242.png?resizew=220)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8f70cf3f6c7acbf60d4a4ca0ce89619.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe02a25afc35da213ba4aee378a308b.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4171e7f713d6b265d56b2662b7af57b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4734735213b599a9915e1ed91a5d8ce4.png)
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