在四棱锥
中,侧面PAD是等边三角形,且平面
平面ABCD,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/82ef8866-ecac-4b58-a134-d7f9df22ed35.png?resizew=115)
(1)AD上是否存在一点M,使得平面
平面ABCD;若存在,请证明,若不存在,请说明理由;
(2)若
的面积为
,求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fa6ea683971fa8b6299d7aab6d04092.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9548b6ebb4d7bde2e73dfa381988ccda.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/82ef8866-ecac-4b58-a134-d7f9df22ed35.png?resizew=115)
(1)AD上是否存在一点M,使得平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a13de8cbfb0b865ea5a61e7a4ff1abe3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/177678001b2ccde1db8f57fa5e017002.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/781850d4ae9acc62b73c2669b60b5d8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
19-20高三下·云南红河·阶段练习 查看更多[7]
云南省红河自治州2019-2020学年高三第二次高中毕业生复习统一检测数学(文科)试题2020届黑龙江省大庆实验中学高三第一次模拟数学(文)试题(已下线)专题19 立体几何综合-2020年高考数学(文)母题题源解密(全国Ⅲ专版)(已下线)【新教材精创】11.4.2平面与平面垂直(第1课时)练习(1)四川省宜宾市叙州区2021-2022学年高三上学期期末数学文科试题(已下线)第48讲 直线与平面、平面与平面垂直陕西师范大学附属中学渭北中学2022-2023学年高二下学期5月月考文科数学试题
更新时间:2020-08-18 00:47:26
|
相似题推荐
解答题-问答题
|
适中
(0.65)
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【推荐1】如图,在四棱锥
中,底面ABCD是矩形,
底面ABCD,且
,E是PC的中点,平面ABE与线段PD交于点F.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/6/b0e2a027-ef50-4abb-a340-71566cdcccea.png?resizew=166)
(1)证明:F为PD的中点;
(2)再从条件①、条件②这两个条件中选择一个作为已知,求直线BE与平面PAD所成角的正弦值.
条件①:三角形BCF的面积为
;
条件②:三棱锥
的体积为1.
注:如果选择条件①和条件②分别解答,按第一个解答计分.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b610c9b9948d88eda8de0fb8d1cf972.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/6/b0e2a027-ef50-4abb-a340-71566cdcccea.png?resizew=166)
(1)证明:F为PD的中点;
(2)再从条件①、条件②这两个条件中选择一个作为已知,求直线BE与平面PAD所成角的正弦值.
条件①:三角形BCF的面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4056761b8f826eeb6ad8c9a151d3c9c.png)
条件②:三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/596ce49d6e81550d75734fe89b0fa495.png)
注:如果选择条件①和条件②分别解答,按第一个解答计分.
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解答题-问答题
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适中
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解题方法
【推荐2】如图,在四棱锥
中,
平面
,正方形
的边长为2,
,设
为侧棱
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/8/9399d0d4-d927-4065-9c03-ae4f85c106a8.png?resizew=174)
(1)求正四棱锥
的体积
;
(2)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/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/00bab2c27eac56fffa4cd7dbe1dcdf1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/8/9399d0d4-d927-4065-9c03-ae4f85c106a8.png?resizew=174)
(1)求正四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c753cb1eb73fd8d136d00462970797.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be54e84508decfcce6d2fcbe6c8c1a92.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
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【推荐1】如图所示的五面体中,四边形
是正方形,平面
平面
,
,
.
![](https://img.xkw.com/dksih/QBM/2021/3/18/2680362924326912/2683226354212864/STEM/7d7418f5-92cd-4faf-8c42-9ba9798f1fb2.png)
(1)证明:平面
面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d28c625d7ac6878957facc8274d459c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b4c256bedf0e28b750f2800034518ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d55581518b8685afb9060b81cc82be94.png)
![](https://img.xkw.com/dksih/QBM/2021/3/18/2680362924326912/2683226354212864/STEM/7d7418f5-92cd-4faf-8c42-9ba9798f1fb2.png)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d28c625d7ac6878957facc8274d459c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca839944d0ac5155e2d78c094899b789.png)
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解答题-证明题
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适中
(0.65)
名校
【推荐2】如图,在四棱锥
中,底面
为直角梯形,
,
,平面
底面
,
为
的中点,
是棱
上的点,
,
,
.
![](https://img.xkw.com/dksih/QBM/2016/3/14/1572537127845888/1572537134120960/STEM/84953fbd114d4b51b8bba986ffe42a7b.png)
(1)求证:平面
平面
;
(2)若
为棱
的中点,求异面直线
与
所成角的余弦值;
(3)若二面角
大小为
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56fbe4053a65b67949981f24c0d30b6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34b0c4c783dd55685bd3e88bb31c6696.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cc0a72038acc13ca8062888b19d8b90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46e467cd82eccddde60d2311291a3e4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/587fc4851a07e9c5d4f1691f415c3de4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34b0c4c783dd55685bd3e88bb31c6696.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316ecb1589c3cc179e2f62507020771e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b693717f525facc79b9a500ed998b109.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f9c827e46d1a395fafbf15cdd6c6c42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/435f34602291e9e293ff64a1606e29dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/230086bddbf64179a3fa4e60ac1320de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fc43d6350189e8e0528f43231c821da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88b5ad219cd9d410d00a2537a75f7d93.png)
![](https://img.xkw.com/dksih/QBM/2016/3/14/1572537127845888/1572537134120960/STEM/84953fbd114d4b51b8bba986ffe42a7b.png)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac5194176611f30b37cb369e3fab61c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baf5cb457a768676c10da10ccfdbb2fe.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f9c827e46d1a395fafbf15cdd6c6c42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/435f34602291e9e293ff64a1606e29dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e065f25fe2db3986cb5861884d0848af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ba77e03bd1d59ae655062171b2b780a.png)
(3)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70f2ed2748d03b256d24e720b7ea5635.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f7408f4e5fbc936c79089b25ecb1cce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69514492e3c353f539ed8a3b83f2bcab.png)
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