名校
1 . 如图,在正方体
中,O是正方形
的中心,E、F分别为棱AB、
的中点,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/0994f8a0-3502-4eb7-b8a5-538e336e0904.png?resizew=144)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efae13e09890f0d9e0603119271172ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/0994f8a0-3502-4eb7-b8a5-538e336e0904.png?resizew=144)
A.直线EF与![]() | B.![]() |
C.平面![]() ![]() | D.OF与![]() ![]() |
您最近一年使用:0次
2020-01-31更新
|
287次组卷
|
2卷引用:重庆市沙坪坝区南开中学校2019-2020学年高二上学期期末数学试题
名校
解题方法
2 . 如图,在正方体
中,点
在面对角线
上运动,则下列四个结论:
①![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e825eb0f9a1dd969b9dc42a22b19f2bc.png)
②![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dc49f3366139ae586850824f13147a0.png)
③
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fae7f4612c548b1f72a964ddb291cd2e.png)
④三棱锥
的体积是定值
其中正确结论的个数有( )个.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/678ef3b6-36e0-4108-a478-a7523cf54c9c.png?resizew=177)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e825eb0f9a1dd969b9dc42a22b19f2bc.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dc49f3366139ae586850824f13147a0.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ba8f7af0e091e082100c3cd7f8c487f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fae7f4612c548b1f72a964ddb291cd2e.png)
④三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6344ed1578060a05f6cb19902a289fe.png)
其中正确结论的个数有( )个.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/678ef3b6-36e0-4108-a478-a7523cf54c9c.png?resizew=177)
A.1 | B.2 |
C.3 | D.4 |
您最近一年使用:0次
2020-03-05更新
|
247次组卷
|
2卷引用:重庆市开州区陈家中学2020-2021学年高二上学期10月月考数学试题
名校
解题方法
3 . 在四棱锥
中,
平面
,底面
是正方形,
,
分别为
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/31172372-162e-4de8-a8e0-e95f6ba28dff.png?resizew=180)
(1)求证:
平面
;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5164a3cc47e266446d49127e2ef10c37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/31172372-162e-4de8-a8e0-e95f6ba28dff.png?resizew=180)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67662c47e2dfa08001a62fa17320f477.png)
您最近一年使用:0次
名校
解题方法
4 . 如图,在三棱柱
中侧棱垂直于底面,且
,点D是AB的中点.
![](https://img.xkw.com/dksih/QBM/2020/2/12/2397658758479872/2398744230510592/STEM/66f0db7319414fbfba0b8d56200feedc.png?resizew=255)
(1)求证:
;
(2)若
,
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://img.xkw.com/dksih/QBM/2020/2/12/2397658758479872/2398744230510592/STEM/66f0db7319414fbfba0b8d56200feedc.png?resizew=255)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/429228f882da65a8e0064c88d02b8e40.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19bc7774144c164f7ebaeca54fa657e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6964f7825bd9a590ce38faefff1326.png)
您最近一年使用:0次
名校
5 . 如图,直三棱柱
中,
,
,
,
为
的中点,点
为线段
上的一点.
![](https://img.xkw.com/dksih/QBM/2020/2/12/2397561701007360/2398735562227712/STEM/649836b91b394ab0b92b441f0451d493.png?resizew=213)
(1)若
,求证:
;
(2)若
,异面直线
与
所成的角为30°,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21ea52361458ce2e49ed0fe99d8e6c02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://img.xkw.com/dksih/QBM/2020/2/12/2397561701007360/2398735562227712/STEM/649836b91b394ab0b92b441f0451d493.png?resizew=213)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e41916523511064a97de39b0f2b323.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b100d01da4756b63cb2aec2698aa542e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2aa198c06307b9880b566119efcb560f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fef9497165e3d5fafe7cf21631b886e5.png)
您最近一年使用:0次
2020-02-14更新
|
245次组卷
|
4卷引用:重庆市第一中学2018-2019学年高二下学期期末数学(理)试题
重庆市第一中学2018-2019学年高二下学期期末数学(理)试题重庆市七校2018-2019学年高二下学期期末联考(理科)数学试题(已下线)专题20 立体几何角的计算问题(测)-2021年高三数学二轮复习讲练测(新高考版)(已下线) 专题24 立体几何角的计算问题(测)-2021年高三数学二轮复习讲练测(文理通用)
名校
解题方法
6 . 如图,三棱柱
中,侧面
为菱形,
的中点为
,且
平面
.
![](https://img.xkw.com/dksih/QBM/2020/2/9/2395180957474816/2395793034846208/STEM/81ba365c-678c-4968-920c-497ef6a52dbe.png)
(1)证明:
;
(2)若
,
,
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ce03b310edce42191f9fa75a1c909ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://img.xkw.com/dksih/QBM/2020/2/9/2395180957474816/2395793034846208/STEM/81ba365c-678c-4968-920c-497ef6a52dbe.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8db87b41df9d3c83d2810a4265d768d3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c7fd49bb962841b4575805030e19add.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f2e238b2757353026133bbe495645e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea67423ce6963c0972867306169f17a.png)
您最近一年使用:0次
2020-02-10更新
|
396次组卷
|
3卷引用:重庆市渝北区松树桥中学校2019-2020学年高二上学期第一次段考考数学试题
名校
7 . 直三棱柱
中,
,
,
,F为棱
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/d1bb34d4-7676-4241-8d55-659892c0e7d7.png?resizew=133)
(1)求证:
;
(2)点M在线段
上运动,当三棱锥
的体积最大时,求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cad7b03f934718b18ce34cdf0b85863.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54397b1d0caa661eff63d0ae5d392b18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/d1bb34d4-7676-4241-8d55-659892c0e7d7.png?resizew=133)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8350081c6259800279b6e090a2e3c5de.png)
(2)点M在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b875b54ca7370441a08f9e89963436b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc6adefae0184f53d2916e33b15040b2.png)
您最近一年使用:0次
名校
8 . 直三棱柱
中,
,
,
,F为棱
的中点.
![](https://img.xkw.com/dksih/QBM/2020/2/9/2395180670017536/2395272055611392/STEM/de5c8bd6-dd5b-49a6-acf9-139bb7363dee.png)
(1)求证:
;
(2)点M在线段
上运动,求三棱锥
的体积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49bd6d0c5f24bfb21fe0aed406aed90e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cad7b03f934718b18ce34cdf0b85863.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c14a66ed4bd66df65bc42c4ac1ed15c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10e7fe3b5d6a05075983af954d65c71c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/2020/2/9/2395180670017536/2395272055611392/STEM/de5c8bd6-dd5b-49a6-acf9-139bb7363dee.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8350081c6259800279b6e090a2e3c5de.png)
(2)点M在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b875b54ca7370441a08f9e89963436b.png)
您最近一年使用:0次
名校
解题方法
9 . 如图,四棱锥
,平面
平面ABE,四边形ABCD为矩形,
,F为CE上的点,且
平面ACE.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/26/7a282a40-dbf9-4ac0-9488-700f520b2271.jpg?resizew=178)
(1)求证:
;
(2)设M在线段DE上,且满足
,试在线段AB上确定一点N,使得
平面BCE,并求MN的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c753cb1eb73fd8d136d00462970797.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf9a6db3571fa57bfa2d5e4d44c51b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/796e03af16c3b35ec4703c850a5035e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fa3c61d6c19e187b4b824b6f5610cdb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/26/7a282a40-dbf9-4ac0-9488-700f520b2271.jpg?resizew=178)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a48e31deb78dadacc7e128ef3eb2a054.png)
(2)设M在线段DE上,且满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f6b9be3999917b47890c1e763dd3f94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
您最近一年使用:0次
2020-02-09更新
|
375次组卷
|
5卷引用:重庆市巴蜀中学2018-2019学年高二下学期期末考试数学(文)试题
重庆市巴蜀中学2018-2019学年高二下学期期末考试数学(文)试题(已下线)专题8.6 翻折与探索性问题(精练)-2021年高考数学(文)一轮复习讲练测(已下线)专题8.6 翻折与探索性问题(精练)-2021年高考数学(文)一轮复习学与练(已下线)专题8.4 直线、平面平行的判定及性质(精讲)-2021年高考数学(理)一轮复习学与练江西省新余市2021届高三二模数学(文)试题
名校
10 . 在三棱柱
中,平面
、平面
、平面
两两垂直.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/eaf1e51d-7f8d-4c4b-afcf-7c529278f7ef.png?resizew=176)
(Ⅰ)求证:
两两垂直;
(Ⅱ)若
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4e06afbd2a14c29cbdadc93009d2d7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/eaf1e51d-7f8d-4c4b-afcf-7c529278f7ef.png?resizew=176)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd035eb3c20dcbfbcb352a0c04ff6532.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/075f4a60eab3e63dfe69e81dc14bf2ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2ac20af67f3e0891be3102d70557ba.png)
您最近一年使用:0次
2019-09-12更新
|
391次组卷
|
4卷引用:重庆市渝北区松树桥中学2020-2021学年高二上学期11月月考数学试题