名校
1 . 如图,平面四边形
由等腰直角
和等边
拼接而成,将
沿
折起,使点
到达点
的位置,且
.
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e694e3836ab29221949ad4a78c9860fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bcbf1197b6a9e629dbd76ba6b8fbd81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47d294d69caac577339f11f477b2047e.png)
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2023-07-14更新
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595次组卷
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4卷引用:陕西省咸阳市武功县普集高级中学2023-2024学年高一下学期第3次月考数学试题
2 . 如图,
是直角梯形
底边
的中点,
,
,
,将
沿
折起形成四棱锥
.
(1)求证:
平面
;
(2)若二面角
为
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee8ef58be8708144272538ee427fb92c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b5ff288b8b59c0494758ae67bbe10d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5164a3cc47e266446d49127e2ef10c37.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/16/9052d297-bd5d-477c-b313-0fe9f9311f54.png?resizew=288)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/370148e9147aa25c60a07ab4ad46e83d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ad1b0a76a887783392268ae203ad22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6dfb039aafe2d2841f8c28b117cf741.png)
您最近一年使用:0次
名校
3 .
是正三角形,线段
和
都垂直于平面
.设
,
,且F为
的中点,如图.
(1)求证:
平面
;
(2)求证:
;
(3)求平面
与平面
所成锐二面角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1642eec556eb252de9c1ab7bb5ca90b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa3b1722b100297f2fa8fad62423149d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ede69346d90f2c2c7d738d90c6aa60a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/5/aa72c9c8-00af-4424-93b5-63c8171293c4.png?resizew=136)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a2b5cfae407016cad45bbdefea05833.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e39b13d187b25461d85a3b8d10c7b678.png)
(3)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ae8768996ca9a0f2c5d9a19abbd54df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
名校
4 . 如图,在四棱锥
中,
,
,
,
,
.
时,求直线
与平面
所成角的大小;
(2)当二面角
为
时,求平面
与平面
所成二面角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5164a3cc47e266446d49127e2ef10c37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6370d6c626bdabf1fc694501ee6c714f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30b0393ce62b24aa5f9b740d4cc6743b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e921f46d90e43f4517c55832b6280f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1387a262fa090afe51656734c3422bba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a7ff7cf4d7094bc927e959157ef1b88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
(2)当二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a351d71fa01d3f5920e374a8ee7b524.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1a63ab608517bb10aa036783dfb51f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
您最近一年使用:0次
2023-06-30更新
|
1197次组卷
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8卷引用:陕西省西安市铁一中学国际部2023-2024学年高一下学期第三月考数学试题
陕西省西安市铁一中学国际部2023-2024学年高一下学期第三月考数学试题江苏省苏州市2022-2023学年高一下学期期末学业质量阳光指标调研数学试题(已下线)模块二 专题5《立体几何初步》单元检测篇 A基础卷 (苏教版)(已下线)第五篇 向量与几何 专题17 三正弦定理、三余弦定理 微点1 三正弦定理、三余弦定理上海市杨浦高级中学2023-2024学年高三上学期11月期中考试数学试卷四川省内江市第二中学2023-2024学年高二上学期12月月考数学试题(已下线)第二章 立体几何中的计算 专题一 空间角 微点11 三正弦定理与三余弦定理(一)【培优版】(已下线)专题3 由二面角求线段长问题(解答题一题多解)
名校
5 . 如图,以等腰直角三角形斜边
上的高
为折痕,把
和
折成互相垂直的两个平面后,则下列四个结论中正确的是( )
![](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/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
A.![]() | B.![]() |
C.平面![]() ![]() | D.二面角![]() ![]() |
您最近一年使用:0次
2023-06-25更新
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522次组卷
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4卷引用:陕西省汉中市西乡县第一中学2023-2024学年高二上学期开学考试数学试题
名校
6 . 如图所示,已知三棱台
中,
,
,
,
,
.
(1)求二面角
的余弦值;
(2)设
分别是棱
的中点,若
平面
,求棱台
的体积.
参考公式:台体的体积公式为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8889bb4fe2736bdc96cc1737ed853a33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc511e0c2c555bfd2532b5d3ecc12b1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c23ad89291eaa30b42a256f8e2b875fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89eac4972d99833acf112d298c6c508b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/27/cf0cfb4e-557d-4361-9918-f700c9cd215f.png?resizew=174)
(1)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c9a94dd71e367f82a9e45b481dc1bfc.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/227c1d105f7abf228e7a4f3097ae93f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9336f9116d35f8febba112381e085da9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5f445af1ae136773cb338920552ff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
参考公式:台体的体积公式为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/811a97b241e481d25c495996bb0779fc.png)
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7 . 截角四面体是一种半正八面体,可由四面体经过适当的截角,即截去四面体的四个顶点所产生的多面体.如图所示,将棱长为
的正四面体沿棱的三等分点作平行于底面的截面,得到所有棱长均为a的截角四面体,现给出下列四个命题:①二面角
的余弦值为
;②该截角四面体的体积为
;③该截角四面体的外接球表面积为
④该截角四面体的表面积为
,则其中正确命题的个数为( )
![](https://img.xkw.com/dksih/QBM/2023/6/19/3262925183123456/3263886087036928/STEM/881a892ad4aa4e508b04d2a6c3522da8.png?resizew=165)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9878a063abcb6098d10560f2bf2d4b71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ec2524be492bca0d1566bf848066f10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f30d314a642667fef559032264647366.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a4c533eae48d59a256cc7d210c23242.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8198a843a1cb2bf15d2f32076d3826e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aecf3ee6a59c3fae5285c15de9102f1.png)
![](https://img.xkw.com/dksih/QBM/2023/6/19/3262925183123456/3263886087036928/STEM/881a892ad4aa4e508b04d2a6c3522da8.png?resizew=165)
A.![]() | B.![]() | C.![]() | D.![]() |
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8 . 已知正三棱柱
中,
,D为AC边的中点,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf0b9bd7a2d1dd5afefbed5fd395d3e.png)
(1)求侧棱长;
(2)求三棱锥D-
的体积;
(3)求二面角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf0b9bd7a2d1dd5afefbed5fd395d3e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/18/da233420-539d-4588-954b-618e88ac7969.png?resizew=185)
(1)求侧棱长;
(2)求三棱锥D-
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f664c0db517bec6886ff0b6100fd474.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78ceb31247add8ca7b0853e801e1d125.png)
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9 . 在三棱锥
中,△ABD和△CBD均为边长为2的等边三角形,且二面角
的平面角为
,则三棱锥的外接球的表面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f1854ba6cc92481d7a616bd2788a47e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-06-13更新
|
287次组卷
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3卷引用:陕西省西北工业大学附属中学2022-2023学年高一下学期第二次月考数学试题
陕西省西北工业大学附属中学2022-2023学年高一下学期第二次月考数学试题江西省乐安县第二中学2022-2023学年高一下学期6月期末数学试题(已下线)专题突破:立体几何外接球的常见模型-同步题型分类归纳讲与练(人教A版2019必修第二册)
10 . 已知四棱锥的底面为梯形
,且
,又
,
,
,平面
平面
,平面
平面
.
(1)判断直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f6760e8ba8eb28ca7ad58dad93d79f9.png)
①;
②为二面角
的平面角.
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2023-05-26更新
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1560次组卷
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6卷引用:陕西省榆林中学2022-2023学年高一下学期第二次月考数学试题
陕西省榆林中学2022-2023学年高一下学期第二次月考数学试题北京市人大附中2023届高三三模数学试题(已下线)专题10 空间向量与立体几何-3(已下线)重难点突破02 利用传统方法求线线角、线面角、二面角与距离(四大题型)北京市海淀区人大附中2024届高三下学期寒假自主复习检测数学试题(已下线)第八章 立体几何初步(二)(知识归纳+题型突破)(2)-单元速记·巧练(人教A版2019必修第二册)