点
为
所在平面外一点,
、
、
与平面
所成的角相等,
,则
的形状可以是__________ .(将以下正确答案的序号填上:①等边三角形;②等腰三角形;③非等腰三角形;④等腰直角三角形.)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a15a004f7d47ed595f063e60075223a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
11-12高二上·浙江嘉兴·期中 查看更多[1]
(已下线)2011-2012学年浙江省桐乡一中高二第一学期期中理科数学试卷
更新时间:2016-12-01 01:48:53
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相似题推荐
填空题-单空题
|
适中
(0.65)
解题方法
【推荐1】已知正方体
的棱长为
,点
为
的中点,
平面
,平面
过点
,则平面
截正方体所得截面图形的面积为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0edb1508fc95765f3bb316bcb5252d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
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名校
解题方法
【推荐2】如图,在正方体ABCD﹣A1B1C1D1中,点E是棱BC的中点,点F是棱CD上的动点.当
=__ 时,D1E⊥平面AB1F.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddd55753980a07b1314ee565f21c9d09.png)
![](https://img.xkw.com/dksih/QBM/2021/5/22/2726625018675200/2831567184330752/STEM/51a372b0-64e4-47e8-a980-05e7de421d78.png?resizew=224)
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【推荐3】如图,矩形
所在平面与正方形
所在平面互相垂直,
,点
在线段
上.给出下列命题:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/45e1bd37-d621-4b28-b4f7-2f787e36ae5c.png?resizew=188)
①直线
直线
;
②直线
与平面
所成角的正弦值的取值范围是
;
③存在点
,使得直线
平面
;
④存在点
,使得直线
平面
.
其中所有真命题的序号是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f84f169e50dc59d4f7a8e1e36f5c847.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29ffb294c579ee62b215164e8899fd4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/45e1bd37-d621-4b28-b4f7-2f787e36ae5c.png?resizew=188)
①直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
②直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e7aec9f50619eb57d9a94fe60051cff.png)
③存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4734735213b599a9915e1ed91a5d8ce4.png)
④存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826bf6fa3706921b77ad0eb4fcc206bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4734735213b599a9915e1ed91a5d8ce4.png)
其中所有真命题的序号是
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【推荐1】古代城池中的“瓮城”,又叫“曲池”,是加装在城门前面或里面的又一层门,若敌人攻入瓮城中,可形成“瓮中捉鳖”之势.如下图的“曲池”是上、下底面均为半圆形的柱体,
平面
为
的中点,则直线
与平面
所成角的正弦值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e4271abd1d57bf573558879f30e130f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8a3d5d669ac76a2ffb07da81d949adf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec353880a1e680a37ecce3b6fb4896f3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/21/a5612c4d-08b1-418f-922a-ed1d34f6ad66.png?resizew=498)
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解题方法
【推荐2】如图,在正三棱柱
中,各棱长均为4,N是
的中点,则点N到直线AB的距离为___________ ;点
到平面ABN的距离为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://img.xkw.com/dksih/QBM/2021/11/25/2858768587800576/2864067163906048/STEM/f430a59f82324c0591e4cd6322e30fcf.png?resizew=164)
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