1 . 如图,在四棱锥
中,平面
平面
,
为等边三角形,四边形
为矩形,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/0b09b412-fe9d-4611-8b27-70ed224b7f82.png?resizew=156)
(1)证明:平面
平面
.
(2)平面
分此棱锥为两部分,若
,求大的部分体积与小的部分体积之比.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf9a6db3571fa57bfa2d5e4d44c51b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/0b09b412-fe9d-4611-8b27-70ed224b7f82.png?resizew=156)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d28c625d7ac6878957facc8274d459c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c4e4a162f12d12a082b8d8fdd1aeab9.png)
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解题方法
2 . 在四棱锥
中,
平面
,底面
是边长为
的正方形,
与平面
所成角的正切值为
,则该四棱锥外接球的表面积为___________ .
![](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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
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名校
解题方法
3 . 中国古代数学名著《九章算术·商功》中记载了一种名为“堑堵”的几何体:“邪解立方,得二堑堵.邪解堑堵,其一为阳马,一为鳖曘”,“堑堵”其实就是底面为直角三角形的直棱柱.已知某“堑堵”的三视图如图所示,则该“堑堵”的侧面积为( )
![](https://img.xkw.com/dksih/QBM/2021/4/12/2698444370165760/2698466449825792/STEM/d4d86568-050e-45a5-a28d-0f62e5655b0e.png?resizew=298)
A.![]() | B.![]() | C.![]() | D.![]() |
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2021-04-12更新
|
388次组卷
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7卷引用:吉林省白山市2021届高三第三次联考(4月份)理科数学试题
20-21高三下·吉林延边·阶段练习
名校
解题方法
4 . 如图所示,半圆弧
所在平面与平面
垂直,且
是弧
上异于
,
的点,
,
,
.
平面
;
(2)若
为弧
的中点,且
求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a2f39d3fcb1664705228e683c2cc3b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbf9194bd849f2648721a4d0222a375e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0edb1508fc95765f3bb316bcb5252d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bc46688d8723cf2003fc25890265200.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bc46688d8723cf2003fc25890265200.png)
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5 . 已知三棱锥
的一条棱长为
,其余棱长均为
.当三棱锥
的体积最大时,它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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
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名校
6 . 已知
,
,
,
,则“
”是“
”的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5986f2991d45fbf3578f08f27d9fd7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40b707f5ee4fbb2e637c65fbc6d8ed03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a042a14e1c3c915ad11544c9e1e57da9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f157205cb5cb4a538b09d989f2d9ae95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84b6e422b2e6f6dada4d8c369559a077.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb26a220ed44c446105df7caa0f1063.png)
A.充分不必要条件 | B.必要不充分条件 |
C.充要条件 | D.既不充分也不必要条件 |
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2021-01-30更新
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8卷引用:吉林省五校联考2020-2021届高三上学期联合模拟考试文科数学试题
14-15高三上·浙江温州·期中
名校
7 . 设
是两条不同的直线,
是两个不同的平面,下列命题中不正确 的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e288596fa3811dd2c17bded60e82e7.png)
A.若![]() ![]() ![]() ![]() |
B.若![]() ![]() ![]() ![]() |
C.若![]() ![]() ![]() |
D.若![]() ![]() ![]() ![]() |
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15卷引用:吉林省实验中学2018届高三上学期第二次月考数学(理)试题
吉林省实验中学2018届高三上学期第二次月考数学(理)试题【市级联考】吉林省延边州2019届高三2月复习质量检测数学(文)试题(已下线)2015届浙江省温州市十校联合体高三上学期期中联考理科数学试卷(已下线)专题06 空间中的平行与垂直-备战2021届高考数学(文)二轮复习题型专练?(通用版)重庆市巴蜀中学2017-2018学年高二上学期期末考试数学(理)试题【校级联考】甘肃省通渭县2017-2018学年高一上学期期末考试数学试题江西省南昌市八一中学2019-2020学年高二下学期期中考试数学(文)试题山东省青岛胶州市2019-2020学年高一下学期期末考试数学试题(已下线)【新东方】杭州新东方高中数学试卷358(已下线)【新东方】423贵州省北京师范大学遵义附属学校2020-2021学年高二上学期期末考试数学(理)试题贵州省北京师范大学遵义附属学校2020-2021学年高二上学期期末考试数学(文)试题安徽省黄山市2020-2021学年高二上学期期末数学(理)试题(已下线)【新东方】双师313高一下四川省泸县第五中学2022-2023学年高二下学期开学考试数学(文)试题
名校
解题方法
8 . 在三棱锥
中,
,
,
,二面角
,
,
的大小均为45°,则三棱锥
的顶点
在底面
的射影为
的______ (填重心、垂心、内心、外心).三棱锥
的外接球的半径为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/addb8e20db1fbb40f17dea52f951b907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7fe637f1537666932491637f9b3d3ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bef3a2b3b1ca1a8dce50114e893599e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33a5d8831a9bef0f3d882d97d28e6d0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
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2卷引用:吉林省吉林市普通中学2020-2021学年度高三上学期第二次调研测试理科数学试题
名校
解题方法
9 . 如图所示,网格纸上小正方形的边长为1,粗线画出的是某一几何体的三视图,则该几何体外接球的表面积为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/8cdca036-435d-4735-a7e5-65801cb026c5.png?resizew=147)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/8cdca036-435d-4735-a7e5-65801cb026c5.png?resizew=147)
A.![]() | B.![]() | C.![]() | D.![]() |
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3卷引用:吉林省长春市第二十九中学2021-2022学年高三上学期第二次质量检测数学(文)试题
解题方法
10 . 如图,正方形
所在平面与以
为直径的半圆
所在平面
互相垂直,
为半圆周上异于
,
两点的任一点,求证:平面
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf4c26f3f4d96117f087400a0f32ece8.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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf4c26f3f4d96117f087400a0f32ece8.png)
![](https://img.xkw.com/dksih/QBM/2020/12/2/2605661541826560/2612451864985600/STEM/448c5a1350e042059230a2db4f37355e.png?resizew=227)
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