名校
解题方法
1 . 在三棱锥
中,
平面ABC,
,
.以A为球心,表面积为
的球面与侧面PBC的交线长为______ .
![](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/0cad7b03f934718b18ce34cdf0b85863.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4fd6d3107ffc0f2f423f271328a8fa9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc4d9a7c9b2ee0253a3a11d5117f9f49.png)
您最近一年使用:0次
2022-01-22更新
|
2494次组卷
|
5卷引用:辽宁省沈阳市第一二〇中学2021-2022学年高一下学期期末数学试题
辽宁省沈阳市第一二〇中学2021-2022学年高一下学期期末数学试题辽宁省六校2022-2023学年高三上学期期中数学试题山东省淄博市2021-2022学年高三上学期期末数学试题山东省威海市2021-2022学年高三上学期期末数学试题(已下线)山东省威海市2022-2023学年高三上学期12月联考数学试题
名校
2 . 如图,在四面体
中,
,
,
、
分别是
、
的中点.若用一个与直线
垂直,且与四面体的每个面都相交的平面
去截该四面体,由此得到一个多边形截面,则下面的说法中正确的有___________ .
![](https://img.xkw.com/dksih/QBM/2022/5/3/2971674429718528/2973409103798272/STEM/dbaace67-7c33-4e3e-b46d-159b82c66b04.png?resizew=205)
①
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc90fee532e50d319081d571410421.png)
②四面体外接球的表面积为
.
③异面直线
与
所成角的正弦值为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d63d1200ef5de2c40f2022af10a87b74.png)
④多边形截面面积的最大值为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a59ebce0d93e5617f848fe79fecb215.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f32924638bc9a40e16bdb24540e8c5ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://img.xkw.com/dksih/QBM/2022/5/3/2971674429718528/2973409103798272/STEM/dbaace67-7c33-4e3e-b46d-159b82c66b04.png?resizew=205)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab1a1fd2fc33e89f357cef772ff6cd0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc90fee532e50d319081d571410421.png)
②四面体外接球的表面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b18b085fd6dbc65b54eeb98fb65393c.png)
③异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d63d1200ef5de2c40f2022af10a87b74.png)
④多边形截面面积的最大值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c0874f019492261eb175bdcc08c189d.png)
您最近一年使用:0次
2022-05-06更新
|
1601次组卷
|
7卷引用:辽宁省沈阳市第二中学2021-2022学年高一下学期6月月考数学试题
辽宁省沈阳市第二中学2021-2022学年高一下学期6月月考数学试题江西省重点中学盟校2022届高三第二次联考数学(理)试题河南省南阳市第一中学校2021-2022学年高三下学期第五次月考理科数学试题四川省成都市蒲江县蒲江中学2021-2022学年高二下学期5月月考数学(理)试题(已下线)模块六 立体几何 大招9 截面问题之补全图(已下线)第二章 立体几何中的计算 专题四 空间几何体截面问题 微点5 空间几何体截面问题综合训练【培优版】(已下线)第四章 立体几何解题通法 专题二 升维法 微点3 升维法综合训练【培优版】
解题方法
3 . 已知三棱柱
中,
,
,
,
,则四面体
的体积为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/883fc5e3faf39829d60804b59deb1730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af3511f3c77d0e04dae8d050dce5f9f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1f118ff1a4e78f9019ffca8a69b03ee.png)
您最近一年使用:0次
名校
解题方法
4 . 如图,在
中,已知
,D是斜边AB上任意一点(不含端点)沿直线CD将
折成直二面角
,当![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f63d194aa0d4091618b6f41f569ee2.png)
___________ 时,折叠后A、B两点间的距离最小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ea7f1f35c6eca0331c4e2b0b3a43cd5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81ca12f11f39405a6a49042c5e294862.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f63d194aa0d4091618b6f41f569ee2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/76033581-f4bd-4977-8006-ef3dc1d9349c.png?resizew=237)
您最近一年使用:0次
2022-01-12更新
|
944次组卷
|
4卷引用:辽宁省鞍山市第三中学2021-2022学年高一下学期期末数学试题
名校
5 . 已知三棱锥
的顶点
在底面的射影
为
的垂心,若
,且三棱锥
的外接球半径为3,则
的最大值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cedb6ab92b2ffc8b542a6587e4a8fa32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d683d27b14d1cd2f567216593ccf770.png)
您最近一年使用:0次
2020-09-14更新
|
861次组卷
|
5卷引用:辽宁省本溪市高级中学2022-2023学年高三上学期期中(二)测试数学试题
名校
6 . 已知
为空间中的一条直线,
为空间中的一个平面,且
,垂足为点
.等腰直角三角形
中,
,
,若
,则
的最大值为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e380108ba2cf04e68a5a9393d2b921c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/635c0e8cd497fd3d766fede583f2e320.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b299e0821bdf2b7aef57f9e82aa46f59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
您最近一年使用:0次
2020-07-23更新
|
615次组卷
|
2卷引用:辽宁省实验中学2020届高三下学期第下学期五次模拟考试数学理科试卷
名校
解题方法
7 . 若点
是棱长为
的正方体
的内切球
的球面上的动点,点
为棱
上的一点,且
,
,则动
点的轨迹的长度为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8af2fdf1944afebb51cb6a5e6c74aadd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d72daa98f98150e631d85eb0c172c88c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73d3505c92b870c0dea9d9e8575f7523.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/16/862deaae-677e-49f4-8c86-332597e24c37.png?resizew=181)
您最近一年使用:0次
2017-05-21更新
|
1496次组卷
|
5卷引用:【全国百强校】辽宁省沈阳市东北育才学校2019届高三第五次模拟数学(文)试题
解题方法
8 . 在正方体
中,
,
分别为棱
,
上的动点,且满足
,则下列命题中,所有正确命题的序号为______ .①当点
异于点
时,直线
与直线
一定异面;②
的面积为定值;③
,
运动过程中,均有
;④
,
运动过程中,线段
在面
内射影所形成的区域面积是四边形
面积的一半.
![](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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c09eec4e14a861af83d7828797d176.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/720fa4afef3ce751987901757198c5e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24006d28116bc097933cc90bcc0ea69f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8dcc9f79fe5f07f25447aa442ee14ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/142c742a4226a2a6873bd55ca8b1f021.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
您最近一年使用:0次
9 . 已知直三棱柱
中,
,
,且
,若点
为
中点,点
为
中点,且
,平面
交底面棱
于点
,且满足
,则多面体
的体积为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fd2cfeefe26ede77898e077de3f7c72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d97f616f0f32beed421129cbbb4db8d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1833908f4db7c8dd708b75b9cade819a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dcf08c283a57c03de8db6d64b1e2218.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcdb0295b373c6e306ca0dcf86f8b941.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c040ffc7bf5a6f812fc54c2b89831bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50dde05e655c5f6d4ef1c0c5b9fff13b.png)
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10 . 如图,在四棱锥
中,底面ABCD为边长为4的正方形,
,
,则四棱锥
外接球的表面积为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecbb2dce15f3d0fe839688575d2a8ff8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/426953ae2ddba3f02753ac3244cfbd7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/1b6e98d3-22f4-4dad-ab34-20b9d3a9d487.png?resizew=136)
您最近一年使用:0次