如图,多面体
中,
是菱形,
,
平面
,
,且
.
![](https://img.xkw.com/dksih/QBM/2021/11/7/2846381693247488/2847671750508544/STEM/2e89019a78624aeb907c2141e33c7e2b.png?resizew=257)
(1)求证:
平面
;
(2)求多面体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/147e7c8ba0bbb540a712f6eb2ed6d22e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b834d2394d1779d267e305df5f5d43d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d552b00c85d1e11ef3ac6b6e06221fa.png)
![](https://img.xkw.com/dksih/QBM/2021/11/7/2846381693247488/2847671750508544/STEM/2e89019a78624aeb907c2141e33c7e2b.png?resizew=257)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5928c98b341b16d4b5a5b931d2929d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6439082496df7567acd5a31a3448db71.png)
(2)求多面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
20-21高一下·广东广州·期末 查看更多[3]
(已下线)广东省广州市仲元中学2020-2021学年高一下学期期末数学试题(已下线)2020年高考全国2数学文高考真题变式题21-23题(已下线)8.6.2直线与平面垂直(第2课时)(练案)-2021-2022学年高一数学同步备课 (人教A版2019 必修第二册)
更新时间:2021-11-09 17:45:55
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解题方法
【推荐1】楔形
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【推荐2】如图,在多面体中,
平面
,
平面
.
,
,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/23/6d31fb0b-f2f8-41ae-818e-f0d00bb7b736.png?resizew=142)
(1)求证:
平面
;
(2)求该多面体的体积;
(3)求平面
与平面
所成的锐二面角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e04a28a7f47d499eaf7451d5a6c3872.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
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(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fa3c61d6c19e187b4b824b6f5610cdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
(2)求该多面体的体积;
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
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解答题-问答题
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适中
(0.65)
解题方法
【推荐1】如图,四面体ABCD中,AD、BD、CD两两垂直,且
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/5/0a17af30-add1-4acd-8ac9-b209d670f112.png?resizew=263)
(1)求异面直线EF与AC所成角的大小;
(2)若E为AB中点,求点E到直线CD的距离;
(3)若直线CE与平面ABD所成角的正切值为
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/928fd3522d2c6ad710eccb3dc5e21146.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/5/0a17af30-add1-4acd-8ac9-b209d670f112.png?resizew=263)
(1)求异面直线EF与AC所成角的大小;
(2)若E为AB中点,求点E到直线CD的距离;
(3)若直线CE与平面ABD所成角的正切值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
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【推荐2】如图,在三棱锥
中,
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/12/3adce5b2-c55e-4bc0-93fc-b7dcb4c05e99.png?resizew=181)
(1)求证:平面
平面VCD;
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a94d59dee2d5a8f0425b64b2083825.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d01592b7e10bf087d1465f9d6899bab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc130e4f2499cc620a0df6542d8127b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f411d63f498747c00213e721f0b1856.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/12/3adce5b2-c55e-4bc0-93fc-b7dcb4c05e99.png?resizew=181)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8704811c9c5dba854310ae0de2ba6b05.png)
(2)试确定角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037fb348109dc2063a268b10eb925a57.png)
您最近一年使用:0次
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名校
【推荐3】如图,底面为菱形的四棱锥
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面
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为
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/fbc31f96-f419-4f5e-a987-75b5cc19f458.png?resizew=141)
(1)求证:
;
(2)求
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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/fbc31f96-f419-4f5e-a987-75b5cc19f458.png?resizew=141)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84be64d28b1623e71ad989f37336b1f2.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
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