名校
解题方法
1 . 已知四棱锥
的底面边长均为1,其顶点
在底面的射影恰好为四边形
对角线的交点,且四条侧棱与底面所成的角都相等异面直线
与
所成角的正弦值为
,则四棱锥
外接球的半径为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a6e2867f32d3f1c3cd36cd3a11a8580.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9868f77d5ab5073b6145f1c6d272122e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
解题方法
2 . 阳马和鳖臑(bienao)是《九章算术·商功》里对两种锥体的称谓.如图所示,取一个长方体,按下图斜割一分为二,得两个模一样的三棱柱,称为堑堵(如图).再沿其中一个堑堵的一个顶点与相对的棱剖开,得四棱锥和三棱锥各一个,有一棱与底面垂直的四棱锥称为阳马(四棱锥
)余下三棱锥称为鳖臑(三棱锥
)若将某长方体沿上述切割方法得到一个阳马一个鳖臑,且该阳马的正视图和鳖臑的侧视图如图所示,则可求出该阳马和鳖臑的表面积之和为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/27/580c6e2c-469d-4ef6-b116-d4470175a617.png?resizew=643)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa177c71fb8e7fc0fcc60da3954eb664.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/27/580c6e2c-469d-4ef6-b116-d4470175a617.png?resizew=643)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2020-04-29更新
|
224次组卷
|
2卷引用:吉林省梅河口市第五中学2019-2020学年高三4月月考数学(文)试题
3 . 一个球形容器的半径为3cm,里面装满纯净水,因不小心混入了1个感冒病毒,从中任取1mL水含有感冒病毒的概率为( )
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
4 . 在圆柱
中,
是上底面圆心,
是下底面圆的直径,点
在下底面圆周上,若
是正三角形,
,则
与平面
所成角为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192f4f9446c954a291f779d963f90257.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b8189f7b0ffe4d20bf0fad43b4ed589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/771b610e4ddefa739a985d1e5462ce5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4819c39c281427826e1b3f7a4c2b720.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-04-02更新
|
104次组卷
|
2卷引用:2020届吉林省梅河口市第五中学等校高三上学期8月联考数学(理)试题
名校
5 . 如图①在直角梯形ABCP中,
,
,
,
,E,F,G分别是线段PC,PD,BC的中点,现将
折起,使平面
平面ABCD如图②.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/3ad1ce45-ab3a-4f78-a677-3f4653651302.png?resizew=316)
(1)求证:
平面EFG;
(2)求二面角G—EF—D的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ace3f86d71ba55a0bd713a047e5b33c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0910601e7d760188d10beee6a48f2ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb46c641aa0616b3b09d596dda500ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36aae82d53f2a35d2f95f467bd5b76cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19ad6a0124359e8b9f7649cf0bff51ab.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/3ad1ce45-ab3a-4f78-a677-3f4653651302.png?resizew=316)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12d8677ae5ca7acf874d93789425d172.png)
(2)求二面角G—EF—D的大小.
您最近一年使用:0次
2020-03-27更新
|
74次组卷
|
2卷引用:吉林省梅河口市第五中学2018-2019学年高二3月月考数学(理)试题
解题方法
6 . 如图,在平行六面体
中,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/7ef8822b-9daa-4a24-8f88-8948e5c13b46.png?resizew=177)
(1)证明:
.
(2)若平面
平面
,且
,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b89cfab4ace9f1ecb5f95a524225d2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e918b70b02a73685e3c536c7f380e2c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/7ef8822b-9daa-4a24-8f88-8948e5c13b46.png?resizew=177)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5939d47c9d38961471f28e291cb6772e.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd14966183389b10618cbe33fd777407.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6636c5d30f7fc72ffb9d0afd381f23ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935fe3125f247b7bea4f065ce9ad985.png)
您最近一年使用:0次
7 . 如图,在平行六面体
中,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/4fdf8831-a2c5-40bd-b7fa-c608b22ca889.png?resizew=186)
(1)证明:
.
(2)若平面
平面
,且
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b89cfab4ace9f1ecb5f95a524225d2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e918b70b02a73685e3c536c7f380e2c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/4fdf8831-a2c5-40bd-b7fa-c608b22ca889.png?resizew=186)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5939d47c9d38961471f28e291cb6772e.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd14966183389b10618cbe33fd777407.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cbeb71857a7607ed75e80672caf200c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f97babc2abb18c1540d3a5504f7cf3fe.png)
您最近一年使用:0次
名校
解题方法
8 . 在直四棱柱
中,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/ea693263-970e-4cef-9aed-e86a4a706706.png?resizew=108)
(1)证明:
;
(2)求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/700a29bdea75bb619871ce408933056c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f07b9534f197f793b1b88efdf96181bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d927585a17c2e98ef7d5a9589a26ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/ea693263-970e-4cef-9aed-e86a4a706706.png?resizew=108)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed026d18604cef1de3aec4cccf5a22f7.png)
(2)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4acec58b956dd6307105578aea3c9fd0.png)
您最近一年使用:0次
名校
9 . 在直四棱柱
中,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/29/03589e22-81de-4d06-a87e-d8f7fce788cd.png?resizew=123)
(1)证明:
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/700a29bdea75bb619871ce408933056c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f07b9534f197f793b1b88efdf96181bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d927585a17c2e98ef7d5a9589a26ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/29/03589e22-81de-4d06-a87e-d8f7fce788cd.png?resizew=123)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed026d18604cef1de3aec4cccf5a22f7.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6424823292a4b68e935d67d2a718424e.png)
您最近一年使用:0次
名校
解题方法
10 . 如图,已知四棱锥
的侧棱
底面
,且底面
是直角梯形,
,
,
,
,
,点
在棱
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/233c7ece-a86d-42ae-b716-e1158903937f.png?resizew=205)
(1)证明:
平面
.
(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/5a1b49f64e0065edad868b25e9fcada3.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/cdb2dd10731b99c0f4f89ee957f8a239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abc28e69c1ba0aac981256887f7dfa94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/430b77d8d2a99713b192dc729ddc2275.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e0f73b3c63084d9c032802e01f9a168.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/257a812d37c047e69a2f47c94c0c47f1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/233c7ece-a86d-42ae-b716-e1158903937f.png?resizew=205)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/982d01f052709b72afeaf1015fc7acc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
2020-03-09更新
|
1900次组卷
|
3卷引用:2020届吉林省梅河口市第五中学高三11月月考数学(理)试题
2020届吉林省梅河口市第五中学高三11月月考数学(理)试题山西省运城市2019-2020学年高二上学期期中数学(理)试题(已下线)考点25 几何法解空间角(讲解)-2021年高考数学复习一轮复习笔记