如图1,在边长为2的菱形
中,
,将
沿对角线
折起到
的位置,使平面
平面
,E是BD的中点,
平面ABD,且
,如图2.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/11/e0dacef5-440c-4ec4-9923-e83b49b964da.png?resizew=262)
(1)求证:
平面
;
(2)在线段AD上是否存在一点M,使得
平面
,若存在,求
的值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fddde3540c30df14382a7beda4cddef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380a94a5bb8cd6a6c8b4ec39019f2fa7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/147e7c8ba0bbb540a712f6eb2ed6d22e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b587b3d65a1d990dafcbb8815adf2e82.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/11/e0dacef5-440c-4ec4-9923-e83b49b964da.png?resizew=262)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a89cc8bc24e31352bcfd1374db7432a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbf3fdaa02b40059091b648461c8c8d0.png)
(2)在线段AD上是否存在一点M,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/414327539b4f53fd39eb5a0e5c455148.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d95a8406c459460675a24d8a1d9abde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d641de320b307374639e50dba2f2212.png)
23-24高二上·广东江门·阶段练习 查看更多[3]
更新时间:2023-12-11 12:05:58
|
相似题推荐
解答题-证明题
|
较易
(0.85)
解题方法
【推荐1】如图,在四棱锥P-ABCD中,底面ABCD是直角梯形,且AD∥BC,AB⊥BC,BC=2AD,已知平面PAB⊥平面ABCD,E,F分别为BC,PC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/c752dd6b-d635-4f34-8a55-144a142d71d0.png?resizew=131)
求证:(1)AB
平面DEF ;
(2)BC⊥平面DEF .
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/c752dd6b-d635-4f34-8a55-144a142d71d0.png?resizew=131)
求证:(1)AB
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
(2)BC⊥平面DEF .
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
名校
解题方法
【推荐2】如图所示,四棱锥
中,
(
是四棱锥
的高),![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0391c245d702d875f90ec233a69adcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d2eea6bad81c91d7bf6555545181109.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccfd3cc8d727f5d4f41c834f6851a094.png)
为线段
上一点,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/2018/4/19/1927333674254336/1930288469016576/STEM/88f3ac441a2c4c5193ed7cb2eb7155cd.png?resizew=215)
(1)证明:
平面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b888abe74a0038fefb5e1ff92c78b736.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0391c245d702d875f90ec233a69adcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d2eea6bad81c91d7bf6555545181109.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccfd3cc8d727f5d4f41c834f6851a094.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bd940068856d423dd049fb345881736.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeef1db30212433062b3297569a7aafd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/2018/4/19/1927333674254336/1930288469016576/STEM/88f3ac441a2c4c5193ed7cb2eb7155cd.png?resizew=215)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7592c4f01c8e06c7ee90df5b9413a9f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1318239c0348e0ba82490206bff3a91e.png)
您最近一年使用:0次
解答题-证明题
|
较易
(0.85)
名校
解题方法
【推荐1】如图,四棱锥
中,底面
是平行四边形,平面
底面
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/8/8347c7bb-6759-4a16-b023-f15ef24878a1.png?resizew=225)
(1)求证:平面
平面
;
(2)求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5164a3cc47e266446d49127e2ef10c37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8dc6db50a9709c3f4d84eee7bdf1250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31b2cc1d0bfd22c88286880b9da1f6f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77e4907ad1efa41c6cefe931737328fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e1f4f255d191786f7d330d278868c2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30b0393ce62b24aa5f9b740d4cc6743b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/8/8347c7bb-6759-4a16-b023-f15ef24878a1.png?resizew=225)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed5f0cfc1049f84a04c81bd213afb8d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c909cd1b6f3fa1ec39eb245e8f5c11c.png)
您最近一年使用:0次
解答题-证明题
|
较易
(0.85)
名校
【推荐2】如图,在三棱锥
中,
平面
,平面
平面
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/4edf30ea-89aa-4797-b245-2ce08dc60e9a.png?resizew=150)
(1)求证:
平面
;
(2)求直线
与平面
所成角的正弦值的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b80ee363635d73f601654339028daec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/4edf30ea-89aa-4797-b245-2ce08dc60e9a.png?resizew=150)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
您最近一年使用:0次
解答题-证明题
|
较易
(0.85)
名校
解题方法
【推荐1】如图,在底面是矩形的四棱锥
中,
平面ABCD,
,
,E是PD的中点.
(1)求证:
平面PAD;
(2)求二面角
的余弦值:
(3)求B点到平面EAC的距离.
![](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/f83a04565a8ebaa111894b724b0ba266.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/29/becd220d-3405-4609-9570-cb3fb058dd19.png?resizew=152)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42f4096ff62b4f29932cd8c6eef661a3.png)
(3)求B点到平面EAC的距离.
您最近一年使用:0次
解答题-证明题
|
较易
(0.85)
【推荐2】已知正方体
中,E为
的中点,求证:直线
与直线
不平行.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
【推荐1】已知
,
,
.
(1)求平面
的一个法向量;
(2)证明:向量
与平面
平行.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e8077ed88333e0a9f03ab92a91ba6c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60e859540e50445d2fd8a5732b4ce238.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/350a7b3a3b62f81449127082d3c1e9f8.png)
(1)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)证明:向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e01ba80d11a8124903c78990105daf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
解题方法
【推荐2】如图,在直棱柱
的底面
中,
,
,棱
,以
为原点,分别以
,
,
所在直线为
轴建立如图的空间直角坐标系
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/51c63b05-d662-4dcb-87ba-8b932726769e.png?resizew=177)
(1)求平面
的一个法向量;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad389858be11534828cc4090e2efa647.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/854f480c60b88b546cb15d3b5622e212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed18681d5039e5c8f1249c44bf15847.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee98db8495cf1f203abe99795102e20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc2a49f58140008b8f85a00f06acdffe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce1132157a33c82610c2d5035493d024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbb16f7dbc4b9993c4efa0764df1d8ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02b87b8fe02993aac5687c9d4df3b3e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/51c63b05-d662-4dcb-87ba-8b932726769e.png?resizew=177)
(1)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d393149fe452850d47f3141099032ddf.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0914b68f106a912420705b2f3928ca42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d393149fe452850d47f3141099032ddf.png)
您最近一年使用:0次