1 . 如图1,在矩形
中,
,
是
与
的交点,将
沿BE折起到图2中
的位置,得到四棱锥
.
平面
;
(2)若
,求三棱锥
的体积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9117c8ff9ae3f39738feca777d58ad6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdfe7976bd3f16bfef5c6f1b4f20f23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2db2b1c641b93caae9b7a82441e4ba70.png)
图1 图2
(1)证明:平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48dc57896ec5163988cb2dfa6e36e123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1eddaf3f33bd9a99162c061c9dd99aee.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0dbac92660844ecbc44386e80f4b577.png)
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2 . 如图,由直三棱柱
和四棱锥
构成的几何体中,
,则该几何体的体积为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06b3e8bee41beb61f3c4afdc554cb455.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ee978f544d165f5d08720eb06f7bdaf.png)
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3 . 已知正方体
的棱长为
为
的中点,
为线段
上一动点,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/418f37840c0422e960ed0fd7e61477e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfbc0b5a8fbde804bd8425a4b76d207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
A.异面直线![]() ![]() ![]() |
B.![]() ![]() |
C.平面![]() ![]() |
D.三棱锥![]() |
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名校
解题方法
4 . 如图,正方体
的棱长为1,动点
在线段
上,
,
分别是
,
的中点,则下列结论中错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
A.![]() |
B.当E为![]() ![]() |
C.三棱锥![]() |
D.存在点![]() ![]() ![]() |
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2024高一下·全国·专题练习
解题方法
5 . 如图,四棱锥
为正四棱锥,底面ABCD是边长为2的正方形,四棱锥的高为1,点E在棱AB上,且
.
满足
,使得
平面PDE?若存在,请求出实数
的值;若不存在,请说明理由.
(2)在第(1)问的条件下,当
平面PDE时,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c29bd76618e3a9b54058e6aa0e4afa9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dbab5da57b89dc441231d00e566fde2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c8ccd4181f956f6e0140bf0ab8f0716.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(2)在第(1)问的条件下,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c8ccd4181f956f6e0140bf0ab8f0716.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16fd1bc6147d69777b26a35d48522f7e.png)
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2024-04-28更新
|
1222次组卷
|
5卷引用:第13章 立体几何初步(提升卷)-重难点突破及混淆易错规避(苏教版2019必修第二册)
(已下线)第13章 立体几何初步(提升卷)-重难点突破及混淆易错规避(苏教版2019必修第二册)(已下线)8.5.3 平面与平面平行【第三课】“上好三节课,做好三套题“高中数学素养晋级之路(已下线)6.6简单几何体的再认识-【帮课堂】(北师大版2019必修第二册)(已下线)专题06 立体几何初步解答题热点题型-《期末真题分类汇编》(江苏专用)(已下线)专题05 高一下期末考前必刷卷03-期末考点大串讲(人教A版2019必修第二册)
6 . 如图,P是棱长为2的正方体
的表面上一个动点,则下列说法正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf725e3d44c1b473c0e748ac2f45f5a.png)
A.当P在平面![]() ![]() |
B.当P在线段AC上运动时,![]() ![]() ![]() |
C.使得直线AP与平面ABCD所成的角为45°的点P的轨迹长度为π+4![]() |
D.若F是棱![]() ![]() ![]() |
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7 . 如图,在四棱柱
中,
是边长为2的菱形,且
,侧面
底面
为
中点.
平面
;
(2)求三棱锥
的体积.
![](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/6b83bce3a6b5e32ec84878da282bcae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f15824dda4f455c45fbe851cc0ea420a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23d11e19c84255eb0431415c2dec553d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1964604e2aef92d0ae9260973df40ac3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/963a175207214d56e9e2acb478e409fd.png)
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8 . 如图,在正方体
中,
,点E在棱
上,且
.
的体积;
(2)在线段
上是否存在点F,使得
平面
?若存在,求
的值;若不存在,请说明理由.
(3)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1364213f546b37f8764ddcb59e36ae4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f4b2b4c0c6650ae7e8fa57465848553.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9d32e76582bf550593fdef53e081225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a98287a302228ece1fa53c5c66c590f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd1125973328ed42da7a53b457d587e3.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0397fff96574dbb83280ecb5fed6398d.png)
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2024-04-23更新
|
1554次组卷
|
5卷引用:第八章 立体几何初步(基础卷)-重难点突破及混淆易错规避(人教A版2019必修第二册)
(已下线)第八章 立体几何初步(基础卷)-重难点突破及混淆易错规避(人教A版2019必修第二册)浙江省鄞州中学2023-2024学年高一下学期期中考试数学试题(已下线)第六章立体几何初步章末二十种常考题型归类(2)-【帮课堂】(北师大版2019必修第二册)(已下线)专题06 立体几何初步解答题热点题型-《期末真题分类汇编》(江苏专用)(已下线)高一期末模拟数学试卷01 -期末考点大串讲(苏教版(2019))
9 . 如图,在梯形
中,
,
,
,
,过点
作
,以
为轴旋转一周得到一个旋转体.
(2)求此旋转体的表面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af260e0d98c95d1e092dc4c6d348e3ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7ea9d92e5c258a50af1e461c7388894.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/929fa05b0d1d2643776e0d09bf3fec44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d620f242099d9e5e3225115c80d9bfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)求此旋转体的表面积.
您最近一年使用:0次
2024-04-22更新
|
769次组卷
|
5卷引用:第八章 立体几何初步(提升卷)-重难点突破及混淆易错规避(人教A版2019必修第二册)
(已下线)第八章 立体几何初步(提升卷)-重难点突破及混淆易错规避(人教A版2019必修第二册)安徽省淮南第二中学2023-2024学年高一下学期期中教学检测数学试题(已下线)专题21 空间图形的表面积和体积-《重难点题型·高分突破》(苏教版2019必修第二册)青海省西宁市第十四中学2023-2024学年高一下学期期中考试数学试卷(已下线)高一期末模拟数学试卷01 -期末考点大串讲(苏教版(2019))
10 . 如图,在四面体
中,
,
,
两两垂直,已知
,
,则点O到平面
的距离为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50bf7d7fa347c09dedde116bb787a3c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98c78f77e5b86ccd537e5f027de9ffe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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