1 . 如图所示,已知在长方体
中,
,则
和
所成角的大小是___________ ,
和BG所成角的大小是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9a0c3a4e61b97fa9bc58f3179fc2958.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/815caebd34d92c29b70ff5508208bd45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/58f04908-b593-4ae6-8a2a-21c1d58eec5f.png?resizew=223)
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2 . 矩形ABCD中,
,现将
沿对角线AC折起,得到四面体
,若异面直线
与
所成角为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dc8ffe7f700b697bbbe215bdfbe6f7b.png)
______ ;若二面角
的大小为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dc8ffe7f700b697bbbe215bdfbe6f7b.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2587e6d16d316d57e5e6836413489bec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dc8ffe7f700b697bbbe215bdfbe6f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f0ac3005d5ecd6d4cea0ce99a47ef3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dc8ffe7f700b697bbbe215bdfbe6f7b.png)
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3 . 正方体
的棱长为2,点
在棱
上运动,过
三点作正方体的截面,若
与
重合,此时截面把正方体分成体积之比为
的两部分,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5085e3cdef9ea6c564e079f745d6fdb.png)
______ ;若
为棱
的中点,则截面面积为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88ee443bc49c6ecba70281c6b0984219.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5743e17bb4843feb9fe46a973a0fab42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5085e3cdef9ea6c564e079f745d6fdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
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4 . 已知长方体ABCD﹣A1B1C1D1的顶点都在球O的表面上,且AC=AA1=2,则球O的表面积为_____ .若A1C1与BD所成的角为60°,则A1D与BC1所成角的余弦值为_____ .
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5 . 已知长方体
的顶点都在球
的表面上,且
,则球
的表面积为______ .若
与
所成的角为
,则
与
所成角的余弦值为______ .
![](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/1c9d5815dc775d5a5810fff0b016a8d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d8eb4a9f462ca0c1d49c3fe91e720d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
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2020-07-13更新
|
299次组卷
|
3卷引用:黑龙江省大庆第一中学2020届高三第三次模拟数学(文)试题
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6 . 正方体
的棱长为2,点
在棱
上运动,过
三点作正方体的截面,若
为棱
的中点,则截面面积为_________ ,若截面把正方体分成体积之比为
的两部分,则
=_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88ee443bc49c6ecba70281c6b0984219.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7561c514be51abd1c3a7686b75307cd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd864e2c2b71121a8cadb61e7c7f0511.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/35c0f552-6c62-41a3-a2c4-b9ffc1f2f517.png?resizew=147)
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2020-06-30更新
|
446次组卷
|
2卷引用:黑龙江省哈尔滨市第六中学校2020届高三第三次模拟考试数学(理)试题
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7 . 已知四棱锥
的底面ABCD是边长为3的正方形,
平面ABCD,
,E为PD中点,过EB作平面
分别与线段PA、PC交于点M,N,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dac92cdc67ef4ca31c4006d347ecf0d.png)
________ ;四边形EMBN的面积为________ .
![](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/f566f6d9d8820c075a48eca82815de72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c193eaf4c5ea5a58ed82457cf92c6893.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dac92cdc67ef4ca31c4006d347ecf0d.png)
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2020-05-31更新
|
909次组卷
|
9卷引用:黑龙江省大庆市大庆铁人中学2021-2022学年高一下学期期末数学试题
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