11-12高二下·吉林延边·期末
1 . 在正方体
中.
![](https://img.xkw.com/dksih/QBM/2012/9/4/1570997134008320/1570997139193856/STEM/14206ce4c4174118940775ed45557564.png?resizew=202)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02a0e00113872f921116b6c0c3177d0f.png)
(2)求异面直线
与
所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://img.xkw.com/dksih/QBM/2012/9/4/1570997134008320/1570997139193856/STEM/14206ce4c4174118940775ed45557564.png?resizew=202)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02a0e00113872f921116b6c0c3177d0f.png)
(2)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
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2016-12-01更新
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1378次组卷
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3卷引用:云南省文山州砚山县第三高级中学2020-2021学年高二上学期期中考试数学试题
云南省文山州砚山县第三高级中学2020-2021学年高二上学期期中考试数学试题(已下线)2011-2012学年吉林省汪清六中高二下学期期末考试文科数学试卷甘肃省金昌市永昌四中2018-2019学年高二下学期期末考试数学(文)试题
11-12高三上·云南昆明·期中
2 . 正三棱锥
的四个顶点都在半径为1的球面上,其中底面的三个顶点在该球的一个大圆上,球心为
,
是线段
的中点,过
与
垂直的平面分别截三棱锥
和球所得平面图形的面积比为_________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18e5ef91fb27dd684a27ae7f1993cfba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18e5ef91fb27dd684a27ae7f1993cfba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
您最近一年使用:0次
10-11高一下·云南昆明·期末
解题方法
3 . 右图是一个几何体的三视图,根据图中数据,可得该几何体的表面积是( )
![](https://img.xkw.com/dksih/QBM/2011/7/19/1570267253514240/1570267258617856/STEM/2fbbaf9be6f142458430fc03289fe9b5.png?resizew=265)
![](https://img.xkw.com/dksih/QBM/2011/7/19/1570267253514240/1570267258617856/STEM/2fbbaf9be6f142458430fc03289fe9b5.png?resizew=265)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2011·云南昆明·一模
解题方法
4 . 如图,正三棱柱
中,
,
是侧棱
的中点.
![](https://img.xkw.com/dksih/QBM/2011/5/16/1570201686392832/1570201691488256/STEM/92ab08c247e84e2c986b6450cf424d2f.png?resizew=117)
(Ⅰ)证明:
;
(Ⅱ)求二面角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeed487430a5b8a330f2d0c52166521a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://img.xkw.com/dksih/QBM/2011/5/16/1570201686392832/1570201691488256/STEM/92ab08c247e84e2c986b6450cf424d2f.png?resizew=117)
(Ⅰ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fa00091b8091763b7a0727c181ce675.png)
(Ⅱ)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b98d08cb05a894f940009f56c74d83c.png)
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