名校
1 . 如图,四棱锥
中,
平面
,
,
,
,
是棱
的中点.
![](https://img.xkw.com/dksih/QBM/2017/6/4/1701753998032896/1701902059012096/STEM/134914263d124c9d966e9711161187a5.png?resizew=133)
(Ⅰ)若
,求证:
平面
;
(Ⅱ)求
的值,使二面角
的平面角最小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0facf189b2a3153beb7b9e077d3b1146.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3c21dd151a53e488a85ccbb10205c6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb689a793465929f004e561242fa993.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/2017/6/4/1701753998032896/1701902059012096/STEM/134914263d124c9d966e9711161187a5.png?resizew=133)
(Ⅰ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f72bf0fce80daad394f2a9d013829c5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4c3f9dd5d0343597a7f58a1989b537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(Ⅱ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1636b4530c0b42d0e0b649e90e3b9e85.png)
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2 . 如图,在三棱锥
中,
底面
,且
,
,
,
、
分别是
、
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/15/310e95f6-4444-419a-acc3-0a7fdd6c6c44.png?resizew=163)
(1)求证:平面
平面
;
(2)求二面角
的平面角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e33a849c6276adc188d414b048665f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f19185a112972b6e6d8b128e49bfdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/022365ed188bd800e0b8a2b4ec1e2303.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9723a6e093c297b001436e8932b1820.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a6e2867f32d3f1c3cd36cd3a11a8580.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2bc5e50b8dfa02601c70822252854a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/15/310e95f6-4444-419a-acc3-0a7fdd6c6c44.png?resizew=163)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17580410bf63dba4fe164265afaac4cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f68bd91703720951780be6110c83860c.png)
您最近一年使用:0次
2016-12-03更新
|
913次组卷
|
4卷引用:天津市和平区2016-2017学年高二下学期期末质量调查数学(理)试题
天津市和平区2016-2017学年高二下学期期末质量调查数学(理)试题2016届辽宁省五校协作体高三上学期期初考试理科数学试卷吉林省长春市九台区第四中学2019-2020学年高二上学期期末考试数学(理科)试题(已下线)模块六 立体几何 大招17 判二面角的锐钝问题
3 . 已知两点
圆
以线段
为直径.
(Ⅰ)求圆
的方程;
(Ⅱ)若直线
:
与圆
相交于
两点,求弦
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/295c3ece9e4a63c9be4828e9b9fe356f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2346db5ec463dedc7700f629c9c0f16c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(Ⅰ)求圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(Ⅱ)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dcaada7649455fbebcdbdbb9a94e6a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
您最近一年使用:0次
4 . (Ⅰ)
的三个顶点分别为
求其外接圆的方程;
(Ⅱ)求经过点
,焦点为
的双曲线方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6d0c630fe5a7ebcf390acb590f5fc13.png)
(Ⅱ)求经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dfdcc23178b48a732835c8ca64b17ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b86858e7611f107bd9425a457618908.png)
您最近一年使用:0次