如图所示,点P在圆柱的上底面圆周上,四边形ABCD为圆柱的下底面的内接四边形,且AC为圆柱下底面的直径,PD为圆柱的母线,且
,圆柱的底面半径为1.
![](https://img.xkw.com/dksih/QBM/2022/1/18/2897255238598656/2901521963900928/STEM/6950ed55-9d36-47cf-ad98-f6e8dbb63740.png?resizew=141)
(1)证明:
;
(2)
,B为
的中点,点Q在线段PB上,记
,求多面体PQACD的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e0f73b3c63084d9c032802e01f9a168.png)
![](https://img.xkw.com/dksih/QBM/2022/1/18/2897255238598656/2901521963900928/STEM/6950ed55-9d36-47cf-ad98-f6e8dbb63740.png?resizew=141)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf6c62979a7aa534a191d8387a741e8.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a88c44f558705de3bcefcfc0ece96b8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/667349d99185bb045030b733352ff7fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac42517cf387345689e1457f62a80ec1.png)
更新时间:2022-01-24 19:44:27
|
相似题推荐
解答题-证明题
|
适中
(0.65)
真题
解题方法
【推荐1】如图,
和
所在平面互相垂直,且
,
,E、F、G分别为AC、DC、AD的中点.
(1)求证:
平面BCG;
(2)求三棱锥D-BCG的体积.
附:锥体的体积公式
,其中S为底面面积,h为高.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b506b0941433a6a5d5387d0ec95596ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/762cd2d2e0550938fe77347b4a3a42ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05536e0ea0f1a2fb2e849706c2552e90.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5f445af1ae136773cb338920552ff2.png)
(2)求三棱锥D-BCG的体积.
附:锥体的体积公式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f7309683ff41a94e5c5cfeabaeda52a.png)
![](https://img.xkw.com/dksih/QBM/2014/6/20/1571786152525824/1571786158497792/STEM/0f901a33-6aef-4231-b65d-10da0af37ca8.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
解题方法
【推荐2】如图,在四棱柱
中,底面是边长为1的正方形,侧棱
平面
,
,
是
的中点.
平面
;
(2)证明:
;
(3)求三棱锥
的体积.
![](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/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7542b49ab149f2be8ba6b48392bef1f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53bdef2e7a7929ad6190302ab44c46c0.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02a0e00113872f921116b6c0c3177d0f.png)
(3)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59e01f2a628e0b2bfbe88ac2714fdb71.png)
您最近一年使用:0次
【推荐1】如图,直三棱柱
中,
,
为
上的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/26/e17a3276-9550-4ffc-86d3-cbb6c6ee956a.png?resizew=143)
(1)证明:平面
平面
;
(2)若
,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e8f93af0e5bb540c2b9af4455ee395.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b29ef5a1361ddf48f47a1f8fdb6c08e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/445fd58459755841d0c6efe7de06dee6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/26/e17a3276-9550-4ffc-86d3-cbb6c6ee956a.png?resizew=143)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba0fbd88fdb064072eedd136e9cb41ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1829c67e306537d1d4665e8fae2227e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935fe3125f247b7bea4f065ce9ad985.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
解题方法
【推荐2】如图,在直三棱柱
中,
,
,
,
,M为侧棱
上一点,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8235316fe8213c385698d96d79de825.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/15/59f112ab-cfd9-482c-84a5-3ce94f680432.png?resizew=147)
(1)求证:
平面
;
(2)求二面角
的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c279c8033acb94c3f91be2e05b0a6bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d313c04fff3842a635b334e356b07efa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1192b3111a6dad01bba5227472bb4072.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8235316fe8213c385698d96d79de825.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/15/59f112ab-cfd9-482c-84a5-3ce94f680432.png?resizew=147)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0edb1508fc95765f3bb316bcb5252d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afac7c616bbb14e1ed428a3c507c7dc.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2e9ac46aabe38e5ea1a8cb0febc98af.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
解题方法
【推荐3】如图所示,在正方体
中,点M为线段
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/724e3475-04f9-4e23-a6d9-5a88250749a5.png?resizew=162)
(1)求证:
;
(2)求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18a99be053c95aefbebe7460e50df572.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc19a633ae5d59707a1fb47b0beab441.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/724e3475-04f9-4e23-a6d9-5a88250749a5.png?resizew=162)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1abcb3827995076cdc4e5062acad494.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f369bec2d5682bf6b8b317a08aff546.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2cee3c7f9cd546ccf8d0a77a2a65bbc.png)
您最近一年使用:0次
【推荐1】如图,
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b2531a14239af1cb3a5e3cbae5edffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/298cc3d9bc6dc88c494b5489ee2ca846.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/20/2c8a359f-1c0d-4a7f-add1-b32e3dd82021.png?resizew=168)
(1)求证:
平面
;
(2)求点
到平面
的距离;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4c3f9dd5d0343597a7f58a1989b537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b2531a14239af1cb3a5e3cbae5edffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/298cc3d9bc6dc88c494b5489ee2ca846.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f5edcfffbdd3a28ddf78b3e089238e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411d1139c919736044af6379743b3d5c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/20/2c8a359f-1c0d-4a7f-add1-b32e3dd82021.png?resizew=168)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9d32e76582bf550593fdef53e081225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20af148464904e21f4374cc8fb886fba.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐2】如图,在四棱锥
中,
为等边三角形,四边形
为平行四边形,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/6/bbdaeffe-d89c-4796-8488-26d21a0e56db.png?resizew=211)
(1)证明:四边形
为矩形;
(2)若
,当四棱锥
的体积最大时,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/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17e9314f88f8de1fbd978a522bb4521f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/6/bbdaeffe-d89c-4796-8488-26d21a0e56db.png?resizew=211)
(1)证明:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f83a04565a8ebaa111894b724b0ba266.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218054144a13435580cd132b9459546c.png)
您最近一年使用:0次