如图,在直三棱柱
中,
,点
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/c841e48a-22c3-4919-b1e2-9c507c1d8031.png?resizew=159)
求证:
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/429228f882da65a8e0064c88d02b8e40.png)
(2)
平面
.
(3)若
,求点
与平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/c841e48a-22c3-4919-b1e2-9c507c1d8031.png?resizew=159)
求证:
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/429228f882da65a8e0064c88d02b8e40.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02cb62f4c1e0e023619922eb8a509c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f62fd0b510920be6bc60d170c3ff3da3.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f16b43a196ed13d269a2e7084cf9dbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea848cd2aa3a464618020475097949fc.png)
更新时间:2023-02-27 06:27:34
|
相似题推荐
解答题-证明题
|
适中
(0.65)
解题方法
【推荐1】已知:a,b是异面直线.
求证:经过直线b有且只有一个平面和a平行.
求证:经过直线b有且只有一个平面和a平行.
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图,在四棱锥P-ABCD中,底面ABCD是矩形,E,F分别是PB,PC的中点.证明:EF∥平面PAD.
![](https://img.xkw.com/dksih/QBM/2018/11/9/2071907738279936/2072019587383296/STEM/2ba6255151204cbb863962a6053cafdd.png?resizew=123)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐1】在五棱锥
中,
,
,
,
.
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/1/a0faed8e-eb2b-4154-ac5e-994be8f09951.png?resizew=162)
(1)求
与平面
所成角的大小
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be89b9d1709d7974a108142c5fa2ccec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26ff02265fcccd967c2274e18f349abc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1647f87a03c23a6db1e89ea272e07714.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4225465934b192802eb75bb50680724.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/515b03f1a4f99d449a63249ae207487a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/1/a0faed8e-eb2b-4154-ac5e-994be8f09951.png?resizew=162)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37793a3a810e823e10c340986f55ddd.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37793a3a810e823e10c340986f55ddd.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐2】如图,已知多面体
的底面是
边长为2的正方形,
底面
,
,且
.
![](https://img.xkw.com/dksih/QBM/2017/5/27/1695973724348416/1696566480396288/STEM/eb17aef7362f4d06aee4db5f15363e29.png?resizew=233)
(1)记线段
的中点为
,在平面
内过点
作一条直线
,使得
平面
,并给予证明.
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a325f7220b9d63033befaa589646e802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed04b01505bbd8a4ac0bc12e46f23bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e25befd6728421dcba71a40e0d5a5ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba1316f4183e8854d38283b716e2ba1b.png)
![](https://img.xkw.com/dksih/QBM/2017/5/27/1695973724348416/1696566480396288/STEM/eb17aef7362f4d06aee4db5f15363e29.png?resizew=233)
(1)记线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffcef9fc6153b770e6c99ff99fdbfc8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f68cea19b2fc4b50673b86e5fb8571db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09d9d486b7f91ba933210dd013a7f2c.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b2b51e1d947f7760628f37608d1b316.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐1】在四棱锥
中,
,
,
平面
,
分别为
的中点,
.
(1)求证:平面
平面
;
(2)求二面角
的大小
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37444a4da006d26dd252bee7c6cecf01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff70a54a149a15fb96b7e1e8406c98ae.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/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb46aaae98bce8e66848e09c2c1cdbd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9801cabc43c024b9c5fac34b7db5d69b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/13/162ce807-2ac3-43cf-838d-5255deb7e5b6.png?resizew=178)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42f4096ff62b4f29932cd8c6eef661a3.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐2】如图,在四棱锥
中,底面
是正方形,侧棱
底面
,二面角
的大小是
,
分别是
的中点,
交
于点
.
![](https://img.xkw.com/dksih/QBM/2023/12/22/3394612672372736/3394646863216640/STEM/b86a51644a3545a19f66a639dbd586d5.png?resizew=212)
(1)求证:
平面
;
(2)设
是直线
的中点,求直线
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/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b796bbaeb8450404c2d146283562006e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01882f77f211b5b82111bc2953f01d7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/747b8ebe5839aba1c514dd0aa7f18d23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a4a6a1e70241d600bc6c104313eac61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2023/12/22/3394612672372736/3394646863216640/STEM/b86a51644a3545a19f66a639dbd586d5.png?resizew=212)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45fbffb9e2c7fa7c5006cde8da0cabe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134ef0b1a2669a09f05bd4dc2496f706.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632917e61f4208959686d118c7f19231.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05479863cf9f41e2ad9f843ea740a3c0.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐3】如图,已知四边形
和四边形
都是直角梯形,
,
,
,
,
,
.设
分别为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/20/f900a1b3-fa93-40b2-b088-9887311302f0.png?resizew=182)
(1)证明:
;
(2)求直线
与平面
所成角的正弦值.
![](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/fcd8e727e4efc22b49649f71ae9c9d84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91025cb468543b7430955eea9b28ac79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40560ea08d6cd8c1d4d9661ee6faaa3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4901a7eda97d6a307db76c4fb196ba3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b829e79bc43e46eb7da604ab812e417e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34f892d82e656fd14e4464c0f04730d4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/20/f900a1b3-fa93-40b2-b088-9887311302f0.png?resizew=182)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bdadcc147a7e441decf7561c9e7310e.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】已知正方体ABCDA1B1C1D1的棱长为2, E, F, G分别是C1C, D1A1, AB的中点,求点A到平面EFG的距离.
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,在四棱柱
中,
平面
,底面
满足
且
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/29/84bbbb02-af97-40b6-9962-5f99d3dc6009.png?resizew=241)
(1)求证:
平面
;
(2)求二面角
所成角的余弦值;
(3)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.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/6dceb5cc71fc50f20649f6b9535fd914.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/991451c5002137302527700e195220e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc9c270d5384dfb3a76711a595472a32.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/29/84bbbb02-af97-40b6-9962-5f99d3dc6009.png?resizew=241)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebb05874eb3353d754af24c9974273e.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46e3f3b9a2b5e0c9f605a65beb86809a.png)
(3)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b0a582c36d62d83c16425b2f54b4354.png)
您最近一年使用:0次