如图,四棱锥
中,侧面
为等边三角形且垂直于底面
,
,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/2022/5/23/2985727444746240/2989396544397312/STEM/8c3ee4eaa60b4f8baef12e8e6a1db9a8.png?resizew=259)
(1)证明:
;
(2)若
面积为
,求点
到面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d78aafccd397e9c88a567abf4993d40f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7af36689a2d2a5f999b3b5859a3c9faf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61588617d22abd00af4ca489bb3a8787.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/2022/5/23/2985727444746240/2989396544397312/STEM/8c3ee4eaa60b4f8baef12e8e6a1db9a8.png?resizew=259)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04fb30a9d07e410ac92c34b8ad0133db.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
更新时间:2022-05-28 23:25:45
|
相似题推荐
解答题-证明题
|
适中
(0.65)
解题方法
【推荐1】如图,多面体
中,四边形
是菱形,
,
平面
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/746294ba-bca2-496e-85e2-b689451be92a.png?resizew=178)
(1)求证:
平面
;
(2)求点
到平面
的距离.
![](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/05740f0c6071846227dc0ec177ad15e8.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/94e48efc6427ccc1c89b29ae6a19638c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d552b00c85d1e11ef3ac6b6e06221fa.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/746294ba-bca2-496e-85e2-b689451be92a.png?resizew=178)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d27ff0b39832f094ec51e28721d739.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20af148464904e21f4374cc8fb886fba.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a0d238b6e9b49bbea22a79402e8e4f.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,四棱柱
的底面
是菱形,
,
底面
,
,
.
![](https://img.xkw.com/dksih/QBM/2021/7/2/2755414457237504/2762739840229376/STEM/8124fad3-47ea-4a92-87bf-9f9cab4d2868.png?resizew=296)
(1)证明:平面
平面
;
(2)若
,求
点到面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a23f01af749100e1888bba06268843db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e5981445b6f2a6c58974158d96a4de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d927585a17c2e98ef7d5a9589a26ac.png)
![](https://img.xkw.com/dksih/QBM/2021/7/2/2755414457237504/2762739840229376/STEM/8124fad3-47ea-4a92-87bf-9f9cab4d2868.png?resizew=296)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e7a534c12010e3b8b4497af179f2c89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b4cd2b33bd983a9ed6575b9de04a46a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8358b9bfd17eb4cb819a4d652b6b561.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】如图,在四棱锥
中,底面ABCD为直角梯形,
,
,
,
为等边三角形,且面
底面ABCD.
;
(2)求面PAD与面PBC所成二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0295d3385f3ec11ad4d77d39d2e68ffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3da7bcea5a45eeae211f5851f12a7517.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16b77a5c3865855fbb3d24f9522ced8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31a470095e295c734a2f368cc6baf1b6.png)
(2)求面PAD与面PBC所成二面角的余弦值.
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
中,平面
底面ABCD,底面ABCD是等腰梯形,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/af8c4480-c85e-43a8-9468-6f7e3c096915.png?resizew=130)
(1)证明:
.
(2)求平面PCD与平面PAB夹角(锐角)的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71a46dc0bb5d8fa33583817e530a5d21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aab40c3da31f132ceded9671f5020ab8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e54dadf00491ec2849d187dae61bc6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/af8c4480-c85e-43a8-9468-6f7e3c096915.png?resizew=130)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8c231fb9aeaf4b73c2d835bb4c3d42b.png)
(2)求平面PCD与平面PAB夹角(锐角)的余弦值.
您最近一年使用:0次