名校
1 . 点
为正方体
的内切球
球面上的动点,点
为
上一点,
,若球
的体积为
,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/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/e731ef1ccc1bded5eb2ea551cd79a12d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bee3bd4ced831e9000e71ef68c44ac3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
您最近一年使用:0次
2017-05-21更新
|
3677次组卷
|
4卷引用:河北省衡水中学2017届高三下学期第二次摸底考试数学(理)试题
解题方法
2 . 如图,网格纸上小正方形的边长为1,粗实线及粗虚线画出的是某四棱锥的三视图,则该四棱锥各个侧面中,最大的侧面面积为
![](https://img.xkw.com/dksih/QBM/2017/4/10/1662899279675392/1663445712437248/STEM/c8b99258-5c74-436a-9a99-356577961939.png?resizew=207)
![](https://img.xkw.com/dksih/QBM/2017/4/10/1662899279675392/1663445712437248/STEM/c8b99258-5c74-436a-9a99-356577961939.png?resizew=207)
A.2 | B.![]() | C.3 | D.4 |
您最近一年使用:0次
名校
解题方法
3 . 把平面图形
上的所有点在一个平面上的射影构成的图形
叫做图形
在这个平面上的射影.如图,在三棱锥
中,
,
,
,
,
,将围成三棱锥的四个三角形的面积从小到大依次记为
,
,
,
,设面积为
的三角形所在的平面为
,则面积为
的三角形在平面
上的射影的面积是
![](https://img.xkw.com/dksih/QBM/2017/3/28/1653753087377408/1656596902756352/STEM/07c1669bb07b4feb900e77cb2c3a00f2.png?resizew=286)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da895d8bd043625a0839128252130d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e7796caec20ab20a46b31f36a188392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73cab28475a885ff0b5b5d947d65b5ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a8739cc8fc1570400f30f5af109a025.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a1100f8c8bd07c7dfc3c29991acf00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca201616362528f3615de6edb2317848.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b56d35b0e69e306a453c5226899c71c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d43eb0b274e00cbbc4a210da4165042.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/530f5b63e797195906285c0c03eb9276.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c2d5971afbff8eca1b9aff5f76f710.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e204eeda3cbe67e9e709be5c790b49f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/530f5b63e797195906285c0c03eb9276.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e204eeda3cbe67e9e709be5c790b49f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://img.xkw.com/dksih/QBM/2017/3/28/1653753087377408/1656596902756352/STEM/07c1669bb07b4feb900e77cb2c3a00f2.png?resizew=286)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2017-04-01更新
|
1850次组卷
|
6卷引用:2017届四川省成都市高三第二次诊断性检测数学理试卷
2017届四川省成都市高三第二次诊断性检测数学理试卷河北省衡水市衡水中学2019届高三下学期六调考试(文)数学试题(已下线)【全国百强校】河北省衡水中学2019届高三下学期六调考试数学(文)试题重庆市万州第二高级中学2023届高三三诊数学试题四川省泸县第五中学2022-2023学年高三上学期第三学月考试数学(理)试题(已下线)专题8.6 空间直线、平面的垂直(一)【八大题型】-举一反三系列
4 . 如图,正方体
中,
是棱
的中点,
是侧面
上的动点,且
平面
,则
与平面
所成角的正切值
构成的集合是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/f1cdada1-bc09-4256-bc1d-e9ccf51f2156.png?resizew=188)
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5d45c10c00742e89d4123977720c0e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2331bccb6ebf5b9fd639df994f575a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f35f348ed8a1690d3ed02aa64459ca50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/f1cdada1-bc09-4256-bc1d-e9ccf51f2156.png?resizew=188)
A.![]() |
B.![]() |
C.![]() |
D.![]() |
您最近一年使用:0次
5 . 某工厂欲加工一件艺术品,需要用到三棱锥形状的坯材,工人将如图所示的长方
材料切割成三棱锥
.
![](https://img.xkw.com/dksih/QBM/2016/7/5/1572883895296000/1572883900850176/STEM/1450807eaf854de487145d59f60ef73f.png)
(Ⅰ)若点
分别是棱
的中点,点
是
上的任意一点,求证:
;
(Ⅱ)已知原长方体材料中,
,
,
,根据艺术品加工需要,工程师必须求出该三棱锥的高;
(i)甲工程师先求出
所在直线与平面
所成的角
,再根据公式
求出三棱锥
的高
.请你根据甲工程师的思路,求该三棱锥的高;
(ii)乙工程师设计了一个求三棱锥的高度的程序,其框图如右图所示,则运行该程序时乙工程师应输入的
的值是多少?(请直接写出
的值,不要求写出演算或推证的过程)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d6e2c5a15ee96de5510c38f68069f56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07f08e3fae189d0de5cb992e4007fca9.png)
![](https://img.xkw.com/dksih/QBM/2016/7/5/1572883895296000/1572883900850176/STEM/1450807eaf854de487145d59f60ef73f.png)
(Ⅰ)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de7878423936bda0d3fe504c4cd81bfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93a9d8b29c7c25bf005c8fa849212eb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fb949f2a7ee89566c5c02b75043f6a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dffc708961cf03f696473e68986b7dd1.png)
(Ⅱ)已知原长方体材料中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a2cd05e4476fc72271e8fdb59a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827064e34563a7f678020ee1fa9b1683.png)
(i)甲工程师先求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4734735213b599a9915e1ed91a5d8ce4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26ab55147ca5c0f958af43b0637ee31b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c5f8d58ee8a1fca928c91bc384d014a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07f08e3fae189d0de5cb992e4007fca9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
(ii)乙工程师设计了一个求三棱锥的高度的程序,其框图如右图所示,则运行该程序时乙工程师应输入的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://img.xkw.com/dksih/QBM/2016/7/5/1572883895296000/1572883900850176/STEM/1d4dbe7a351a4097b41c15db6f6744d6.png)
您最近一年使用:0次
6 . 如图所示,直三棱柱
的各条棱长均为
,
是侧棱
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/3c7b9370-b073-4d09-b94e-d9f611c08d99.png?resizew=158)
(1)求证:平面
平面
;
(2)求异面直线
与
所成角的余弦值;
(3)求平面
与平面
所成二面角(锐角)的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe2010a4b6fb8908822754aca5231c32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f0b669ef4514f24ee09adeff7f41238.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d3aad224c7a39f0ca496a62d57337d7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/3c7b9370-b073-4d09-b94e-d9f611c08d99.png?resizew=158)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3883af0ec5594aeb320f13171d14607.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1201c0dd34897bc937f75547da5cf871.png)
(2)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7809a4b87d04f66bcb391b70b80c8091.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5534ba448f65d4c1d52be222aace803a.png)
(3)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a91c01f9d5e032a892a52f35cf06a1aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a2cbcf1a679d701806db233b964e272.png)
您最近一年使用:0次
2011·广东广州·一模
7 . 如图,在三棱柱
中,侧棱
底面
,
为
的中点,
.
![](https://img.xkw.com/dksih/QBM/2015/7/10/1572177749975040/1572177755955200/STEM/3af9ab3a5da64c5b809eb2ccc9552c72.png)
(1)求证:
平面
;
(2)若四棱锥
的体积为
, 求二面角
的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f47d6a88e962cd790d2f159c021ec1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19434b67703318b18be7efee7be590bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddd31830ee24aac661e2945f003185c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35909b72f6e48a33ae9abb1d63ff91aa.png)
![](https://img.xkw.com/dksih/QBM/2015/7/10/1572177749975040/1572177755955200/STEM/3af9ab3a5da64c5b809eb2ccc9552c72.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1c920d02068d0e63ffdab70786c526d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a935b7d21a103a264b6e96ecf82dbe4a.png)
(2)若四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0adbce1dad20e549da87b5ed95ab264a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f1528250698e878bb68bc93d882a598.png)
您最近一年使用:0次
2014·河北衡水·一模
名校
8 . 如图,已知长方形
中,
,
为
的中点.将
沿
折起,使得平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/10/b7cca480-f742-4365-b0e7-d6bb45df58ac.png?resizew=392)
(1)求证:
;
(2)若点
是线段
上的一动点,问点E在何位置时,二面角
的余弦值为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/2014/4/25/1571665321623552/1571665327529984/STEM/cb120fddf0834670a2402af1dec613f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e1e88b36ff71fe69c07bade0f95f1ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bb5012f6c70a1e98d682b6d021fadd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0760712e3e2ea02b755b751e760d0c55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/10/b7cca480-f742-4365-b0e7-d6bb45df58ac.png?resizew=392)
(1)求证:
![](https://img.xkw.com/dksih/QBM/2014/4/25/1571665321623552/1571665327529984/STEM/166eea3c675d40da9df21ecb506066b3.png)
(2)若点
![](https://img.xkw.com/dksih/QBM/2014/4/25/1571665321623552/1571665327529984/STEM/03d6e6e1eaaa4385828c1eb274fde031.png)
![](https://img.xkw.com/dksih/QBM/2014/4/25/1571665321623552/1571665327529984/STEM/7d591459a7ff4a5b84f8bb101313da35.png)
![](https://img.xkw.com/dksih/QBM/2014/4/25/1571665321623552/1571665327529984/STEM/4a0c98ebb87e4e59bece718a6f23563d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dee14db57f0c762aad845cf5b4a243c0.png)
您最近一年使用:0次
2016-12-03更新
|
2189次组卷
|
3卷引用:2014届河北省冀州中学高三年级模拟考试理科数学试卷
9 . 如图,菱形
的边长为2,现将
沿对角线AC折起至
位置,并使平面
平面
.
![](https://img.xkw.com/dksih/QBM/2015/6/29/1572153909460992/null/STEM/6a3b0ef6b0b34b7da5336a19e4b20d1c.png?resizew=314)
(1)求证:
;
(2)在菱形
中,若
,求直线AB与平面PBC所成角的正弦值;
(3)求四面体PABC体积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f8f01137e92c0f2e63467036ae9cce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b280088a8f97b52c2145bc709434e7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://img.xkw.com/dksih/QBM/2015/6/29/1572153909460992/null/STEM/6a3b0ef6b0b34b7da5336a19e4b20d1c.png?resizew=314)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bbd7c2767c106faf27d6a97ebc8e739.png)
(2)在菱形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05740f0c6071846227dc0ec177ad15e8.png)
(3)求四面体PABC体积的最大值.
您最近一年使用:0次
10 . 如图所示,正方形
所在的平面与等腰
所在的平面互相垂直,其中顶
,
,
为线段
的中点.
![](https://img.xkw.com/dksih/QBM/2015/6/26/1572149224890368/1572149230878720/STEM/86e1db42f50947ad939d5e00ed15e5f7.png)
(1)若
是线段
上的中点,求证:
平面
;
(2)若
是线段
上的一个动点,设直线
与平面
所成角的大小为
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d73d6dde62cacc0d1fc589d3f1565304.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7285073a8077bafb193096e607054f02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1f9c366fe5be0cbac6bb698c6dc506a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://img.xkw.com/dksih/QBM/2015/6/26/1572149224890368/1572149230878720/STEM/86e1db42f50947ad939d5e00ed15e5f7.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38f7dd424c1184e0656dcdad0e8b6d84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83f1f880e5ffbff036953acaca90c41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26ab55147ca5c0f958af43b0637ee31b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b91d440fbc10a30a16e94a9c3e62606.png)
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