名校
解题方法
1 . 在正四棱锥P—ABCD中,
,则该四棱锥的体积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f8237b4c4aa46f629250bccba436e06.png)
A.21 | B.24 | C.![]() | D.![]() |
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2023-04-20更新
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363次组卷
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4卷引用:贵州省毕节市金沙县2022-2023学年高二上学期12月月考数学试题
2 . 甲烷是一种有机化合物,分子式为
,其在自然界中分布很广,是天然气、沼气的主要成分.如图所示的为甲烷的分子结构模型,已知任意两个氢原子之间的距离
(H-H键长)相等,碳原子到四个氢原子的距离
(C-H键长)均相等,任意两个H-C-H键之间的夹角为(键角)均相等,且它的余弦值为
,即
,若
,则以这四个氢原子为顶点的四面体的体积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eff19349a80467d65564cc2953f0c978.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65abdf27c9e28f330c977d85e77e39a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ae6e8f1b46d8d3c95aa0aac54bd4f06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f30d314a642667fef559032264647366.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4e8ad0e1c28c5412964c97cd8ef5ee8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29d2ee923a118700a40edfcc7f966624.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2022-01-27更新
|
699次组卷
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10卷引用:贵州省毕节市2021-2022学年高二上学期期末教学质量检测数学(文)试题
贵州省毕节市2021-2022学年高二上学期期末教学质量检测数学(文)试题江西省景德镇一中2022-2023学年高二(18班)上学期期中考试数学试题湖北省十堰市2021-2022学年高三上学期元月期末数学试题福建省莆田市2022届高三第一次教学质量检测数学试题(已下线)技巧01 选择题解法与技巧(讲)--第二篇 解题技巧篇-《2022年高考数学二轮复习讲练测(新高考·全国卷)》云南省楚雄州2022届高三上学期期末教育学业质量监测数学(文)试题云南省楚雄州2022届高三上学期期末教育学业质量监测数学(理)试题云南省楚雄彝族自治州牟定县第一高级中学2022届高三上学期期末数学(文)试题云南省楚雄彝族自治州牟定县第一高级中学2022届高三上学期期末数学(理)试题山东省菏泽市鄄城县第一中学2023-2024学年高一下学期4月月考数学试题
解题方法
3 . 一个几何体的三视图如图所示,则该几何体的体积为________ .
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/18/0c3d0fe6-a954-4731-95ef-81161176f483.png?resizew=269)
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名校
4 . 若圆锥的轴截面是顶角为
的等腰三角形,且圆锥的侧面积为
,则该圆锥的体积为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/231b861d6d1f1d0b9f52b041cb40eb62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd2f172ac16da76136cd2faa0fa26915.png)
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2021-07-15更新
|
552次组卷
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2卷引用:贵州省毕节市2021-2022学年高二上学期期末教学质量检测数学(文)试题
解题方法
5 . 如图,在四棱锥
中,
平面
,底面
为矩形,
,直线
、
与平面
所成角分别为30°、45°,E为
的中点.
![](https://img.xkw.com/dksih/QBM/2021/3/5/2671367494205440/2671911181500416/STEM/112808984839436287be1a85b1e91fbd.png?resizew=186)
(1)已知点F为
中点,求证:
平面
;
(2)求四棱锥
的体积.
![](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/fcc532cfe64300cb3da9e04a307c957a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/2021/3/5/2671367494205440/2671911181500416/STEM/112808984839436287be1a85b1e91fbd.png?resizew=186)
(1)已知点F为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8f70cf3f6c7acbf60d4a4ca0ce89619.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e6c2dad46a9052a4185a4f7b4ae8a2e.png)
(2)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
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解题方法
6 . 在四棱锥P-ABCD中,底面ABCD是直角梯形,AB
CD,∠ABC=90°,AB=PB=PC=BC=2CD=2,平面PBC⊥平面ABCD.
(1)求证:AB⊥平面PBC;
(2)求三棱锥C-ADP的体积;
(3)在棱PB上是否存在点M,使CM
平面PAD?若存在,求
的值.若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/4/4fc1c2ef-bc51-407d-97c8-7277426e28a6.png?resizew=165)
(1)求证:AB⊥平面PBC;
(2)求三棱锥C-ADP的体积;
(3)在棱PB上是否存在点M,使CM
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b505e0df1131e3a93fc81d13f6e224e7.png)
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名校
解题方法
7 . 如图所示,在四棱锥
中,底面
为菱形,且
,平面
平面
,
,
分别在棱
,
上,且
.
![](https://img.xkw.com/dksih/QBM/2020/6/24/2491672798584832/2492566731939840/STEM/f730b2e667944a37b9e8d45b89c5f876.png?resizew=222)
(1)求证:
平面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4f5eec0addba78f2e0cdfb7ecc59a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39911ef0f64558e572309561a7f4f74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d70de1ffdd9aa376b09bbcfa12644a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f739ea58db56d09da0e2e9dfd7f8dea7.png)
![](https://img.xkw.com/dksih/QBM/2020/6/24/2491672798584832/2492566731939840/STEM/f730b2e667944a37b9e8d45b89c5f876.png?resizew=222)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31c34b18525831f3eda7bb90be0199b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee72fd8a5a52d08a4fddcf0830a8e103.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/806a043f5365ce6b9f149ce26d8c27b8.png)
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2020-06-26更新
|
518次组卷
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2卷引用:贵州省毕节市民族中学2021-2022学年高二上学期期中考试数学试题
名校
8 . 已知球
的半径为
,则它的外切圆锥体积的最小值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
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2020-04-19更新
|
662次组卷
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6卷引用:贵州省毕节市实验高级中学2019-2020学年高二下学期期中考试数学(文)试题
贵州省毕节市实验高级中学2019-2020学年高二下学期期中考试数学(文)试题安徽省蚌埠市田家炳中学2019-2020学年高二下学期开学考试数学(文)试题广东省深圳市2019-2020学年高三下学期第二次线上统一测试数学(文)试题江苏省盐城市第一中学2020届高三下学期6月第二次调研考试数学试题(已下线)专题15 几何体的体积-2020年高考数学(理)母题题源解密(全国Ⅲ专版)(已下线)专题16 几何体的体积-2020年高考数学(文)母题题源解密(全国Ⅲ专版)
名校
解题方法
9 . 如图,AB是半圆O的直径,C是半圆上一点,M是PB的中点,
平面ABC,且
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/2310ab72-3e83-4126-98ce-c6183d09c20f.png?resizew=131)
(1)求证:
平面PAC;
(2)求三棱锥M—ABC体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/967f74b8993c61634ceed95edca05ffd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8e1534947edbf652f61480a836f4123.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/2310ab72-3e83-4126-98ce-c6183d09c20f.png?resizew=131)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
(2)求三棱锥M—ABC体积.
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2020-03-13更新
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489次组卷
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4卷引用:贵州省毕节市赫章县2021-2022学年高二上学期期末教学质量监测数学(文)试题
10 . 已知正三棱柱
中,
,
,点
为
的中点,点
在线段
上.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/d50f80dc-18f1-431e-8d5b-5dcea6de709c.jpg?resizew=180)
(1)当
时,求证
;
(2)是否存在点
,使三棱锥
的体积恰为三棱柱
体积的
,若存在,求
的长,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d81edebf6cc38995158308c7fd2b2631.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/editorImg/2022/12/1/d50f80dc-18f1-431e-8d5b-5dcea6de709c.jpg?resizew=180)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3f48054840ab624f9787bfd372f4cb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78c332469fd24dac254394c50038c35e.png)
(2)是否存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bd87eb91c373da659934ccb01dae2b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
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2020-01-06更新
|
152次组卷
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4卷引用:贵州省毕节市毕节二中2020-2021学年高二上学期理科数学第二次月考试题