解题方法
1 . 已知正方体
的棱长为
,则下列命题正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
A.点![]() ![]() ![]() |
B.直线![]() ![]() ![]() |
C.若![]() ![]() ![]() ![]() ![]() ![]() ![]() |
D.![]() ![]() ![]() ![]() ![]() |
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2 . 在空间四边形
中,
,
,
,二面角
的平面角为
,
为
的中点,则
与
所成的角为___ .若点
为
的重心,则
=___ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c72d84886fada881f230cdce6f6b268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35333abd7f02d663d15251bc5cbbf921.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe7f0401adb20a8b873d6997b2f6a236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f0ac3005d5ecd6d4cea0ce99a47ef3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0211da37e92f915e781691296578ba0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af3c4f873b389dba32b091b8ebfba248.png)
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2022-07-17更新
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4卷引用:福建省莆田市2021-2022学年高一下学期期末数学试题
福建省莆田市2021-2022学年高一下学期期末数学试题 安徽师范大学附属中学2022-2023学年高二上学期入学考试数学试题吉林省吉林市第一中学2022-2023学年高一上学期第四次(1月)教学质量检测数学试题(已下线)8.3.1 棱柱、棱锥、棱台的表面积和体积(分层作业)-【上好课】2022-2023学年高一数学同步备课系列(人教A版2019必修第二册)
名校
解题方法
3 . 如图,在正方体
中,线段
上有两个动点E,F,且
(m为正常数),则下列结论中正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/29/4f82fec2-58cb-4e51-a7bb-be2ef0b26775.png?resizew=164)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfbc0b5a8fbde804bd8425a4b76d207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eba2963436532f0304a31f789bb5449.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/29/4f82fec2-58cb-4e51-a7bb-be2ef0b26775.png?resizew=164)
A.![]() |
B.线段![]() ![]() |
C.![]() ![]() ![]() |
D.三棱锥![]() |
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2022-07-17更新
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523次组卷
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3卷引用:福建省莆田市2021-2022学年高一下学期期末数学试题
福建省莆田市2021-2022学年高一下学期期末数学试题 福建省福州第二中学2022-2023学年高一下学期第四学段(期末)考试数学试题(已下线)高一升高二开学分班选拔考试卷(测试范围:苏教版2019必修第二册)
名校
4 . 如图1,在边长为2的正方形ABCD中,E,F分别为BC,CD的中点,沿AE、AF及EF把这个正方形折成一个四面体,使得B、C、D三点重合于点S,得到四面体
(如图2).下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/922dae27e2bef111979574e15de3a4cf.png)
A.平面![]() |
B.四面体![]() ![]() |
C.二面角![]() ![]() |
D.顶点S在底面AEF上的射影为![]() |
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2022-07-16更新
|
1076次组卷
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8卷引用:福建省华安县第一中学2022-2023学年高一下学期期末考试数学模拟试题
5 . 在棱长为
的正方体
中,
为
上任意一点,
为
上任意两点,且
的长为定值,则下面的四个值中为定值的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf9b288c48c73463a2f214f02b6952a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
A.点![]() ![]() |
B.三棱锥![]() |
C.直线![]() ![]() |
D.二面角![]() |
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解题方法
6 . 如图,在直三棱柱
中,E为
的中点,且
.
![](https://img.xkw.com/dksih/QBM/2022/7/13/3021843887800320/3023043987431424/STEM/793538b5c7ec415d83ada95cf3293d98.png?resizew=182)
(1)证明:AB⊥BC;
(2)若
,且F为AC中点,求点B到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c07a1f4c2152fa069545e5a8ce987992.png)
![](https://img.xkw.com/dksih/QBM/2022/7/13/3021843887800320/3023043987431424/STEM/793538b5c7ec415d83ada95cf3293d98.png?resizew=182)
(1)证明:AB⊥BC;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f3be3dcde7b744f420a588cb8dd5b01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41f676a67a3dd9284d4d8892b35f23c3.png)
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名校
解题方法
7 . 如图,在三棱锥
中,
,
均为等边三角形.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/28/008f1057-474d-41c8-a462-4bfb86a30338.png?resizew=153)
(1)求证:
;
(2)若
,
.求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/28/008f1057-474d-41c8-a462-4bfb86a30338.png?resizew=153)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bafa8c14100a4f847b41b9148954116c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9641d01140939c44450bf39773272af6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
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2022-07-15更新
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462次组卷
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2卷引用:福建省福州市山海联盟教学协作体2021-2022学年高一下学期期末考试数学试题
名校
解题方法
8 . 如图,四棱锥
-
中,
为正方形,
为
中点,平面
⊥平面
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/21/cb684d2b-842f-476f-84e9-5d469c790436.png?resizew=202)
(1)证明:
//平面
;
(2)证明:
;
(3)求三棱锥
-
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.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/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b70e550fa3c5aaf1b9c28f36fd5ed5d1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/21/cb684d2b-842f-476f-84e9-5d469c790436.png?resizew=202)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c583493109d50c9e4634c05e9042a9f.png)
(3)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
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2022-07-15更新
|
1726次组卷
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5卷引用:福建省福州黎明中学2021-2022学年高一下学期期末考试数学试题
9 . 如图,设E,F分别是长方体
的棱CD上的两个动点,点E在点F的左边,且满足
,有下列结论:( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/21/d5f0b1de-7aeb-45f6-9e1f-358403232564.png?resizew=160)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/366e62778cd38f62e722b73d8cb9a542.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/21/d5f0b1de-7aeb-45f6-9e1f-358403232564.png?resizew=160)
A.![]() ![]() |
B.三棱锥![]() |
C.![]() ![]() |
D.平面![]() ![]() |
您最近一年使用:0次
2022-07-14更新
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300次组卷
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2卷引用:福建省山海联盟校教学协作体2021-2022学年高二下学期期末考试数学试题
10 . 已知平面四边形
,
,
(如图1所示),现将
沿
边折起,使得平面
平面
,点
为线段
的中点,
为线段
上一点,(如图2所示).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/14/626f0ceb-0a28-43c0-8acd-512bf367ef0c.png?resizew=243)
(1)求证:
平面
;
(2)若二面角
的余弦值为
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/625bca170fed3fbdc1441b3c0df4a6bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/389df3a1b8b7c1b0a4296655c56ee33a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/14/626f0ceb-0a28-43c0-8acd-512bf367ef0c.png?resizew=243)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2b4e753ef119608188c46a50ec597e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9905491a66a3ee51536b204970ff7c9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e468f168f3657d84d44be5eb89a62d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ab735cbfb3c34c9e36ee059bca5ecdf.png)
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