解题方法
1 . 已知在三棱锥A-BCD中,
是正三角形,
,
,
,则此三棱锥外接球的体积等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a8d93245c3ed70be66530315862914a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
2 . 已知直三棱柱
的底面为直角三角形,且内接于球O,若此三棱柱
的高为2,体积是1,则球O的半径的最小值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
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解题方法
3 . 一个几何体的直观图与正视图、俯视图如图所示,则它的体积为( )
![](https://img.xkw.com/dksih/QBM/2020/11/5/2586330410401792/2586954135396352/STEM/cbf8fbced1924cffa087141c9e548350.png?resizew=378)
![](https://img.xkw.com/dksih/QBM/2020/11/5/2586330410401792/2586954135396352/STEM/cbf8fbced1924cffa087141c9e548350.png?resizew=378)
A.8 | B.![]() | C.![]() | D.16 |
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解题方法
4 . 某四棱锥的三视图如图所示,则该四棱锥的体积为( )
![](https://img.xkw.com/dksih/QBM/2020/11/3/2585231855124480/2585659053252608/STEM/bc54c511d3ca4b23a4c65af92c2499db.png?resizew=265)
![](https://img.xkw.com/dksih/QBM/2020/11/3/2585231855124480/2585659053252608/STEM/bc54c511d3ca4b23a4c65af92c2499db.png?resizew=265)
A.2 | B.![]() | C.![]() | D.4 |
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2020-11-04更新
|
574次组卷
|
6卷引用:广西钦州市、崇左市2021届高三上学期第一次教学质量检测数学(理)试题
5 . 在正四棱柱
中,
,
,点E在侧棱
上,且
.设三棱锥
的体积为
,四棱锥
的体积为
,则
的值为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f121eabff3c62c1a196d9ca5f6f83f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d927585a17c2e98ef7d5a9589a26ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1859959fdb4c5edd8056893f94a10a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adc90c2d45477e166b02359525f40aa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8464984cd14a5a0990b5ad262b512838.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4764374bd2fb78e59cd0b283637baeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c753cb1eb73fd8d136d00462970797.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63055a5d6916f99d07fede49120753f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f737b04ce09bc7e1ed86dc9b3c85203b.png)
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2020-09-14更新
|
253次组卷
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2卷引用:广西来宾市2020届高三4月教学质量诊断性联合考试数学(文)试题
6 . 某几何体的三视图如图,其中侧视图与俯视图都是腰长为
的等腰直角三角形,正视图是边长为
的正方形,则此几何体的表面积为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/a13beecd-ad00-4da7-882f-b607529f5a3a.png?resizew=139)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/a13beecd-ad00-4da7-882f-b607529f5a3a.png?resizew=139)
A.8 | B.![]() | C.![]() | D.![]() |
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2020-07-10更新
|
276次组卷
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2卷引用:广西梧州市2021届高三3月联考数学(理)试题
7 . 如图,在四棱锥
中,四边形
是等腰梯形,
,
,
,三角形
是等边三角形,平面
平面
,
、
分别为
、
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/1c433b7f-2c7d-4d1b-b037-4708e859c6db.png?resizew=195)
(1)求证:平面
平面
;
(2)若
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15416b74b2ecbcfa38cf34a9ffff730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae139b51956b9281d73d9ba82b875e46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc9c9cfa597b444b5c9dbae7a825a695.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/448cbac9a1ef3de7538a6b30cdc39582.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/1c433b7f-2c7d-4d1b-b037-4708e859c6db.png?resizew=195)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/235d1553f6806c1eee3b17b94d23f0f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84b156bc439fbaba3bfc9937beccb9b2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58ce281401b92d11871867cf5a5fe199.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0421a60cf7269fd9869c77c59a84d2a1.png)
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名校
解题方法
8 . 某几何体的三视图如图所示(单位:cm),则该几何体的表面积(单位:
)为( )
![](https://img.xkw.com/dksih/QBM/2020/5/20/2467035981668352/2467609561776128/STEM/59309c11-c46b-4325-ae56-9fcefaac4ed4.png?resizew=403)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92b41821b589c7c0b87a1470c57979a4.png)
![](https://img.xkw.com/dksih/QBM/2020/5/20/2467035981668352/2467609561776128/STEM/59309c11-c46b-4325-ae56-9fcefaac4ed4.png?resizew=403)
A.32 | B.36 | C.40 | D.48 |
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2020-05-21更新
|
268次组卷
|
6卷引用:广西桂林市、崇左市2021届高三5月份数学(理)第二次联考试题
广西桂林市、崇左市2021届高三5月份数学(理)第二次联考试题广西桂林市、崇左市2021届高三5月份高考数学(文)第二次联考试题2020届上海市虹口区高三下学期二模数学试题上海市复旦大学附属中学2020-2021学年高二下学期期末数学试题(已下线)考向22 空间几何体-备战2022年高考数学一轮复习考点微专题(上海专用)(已下线)课时44 几何体的表面积与体积-2022年高考数学一轮复习小题多维练(上海专用)
9 . 一个圆锥恰有三条母线两两夹角为
,若该圆锥的侧面积为
,则该圆锥的体积为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/563ea4aa5c8936a2959fe140cd8f5506.png)
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2020-05-19更新
|
279次组卷
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3卷引用:广西桂林、崇左、贺州2019-2020学年高三5月联合模拟考试数学(文)试题
名校
10 . 如图是一个由正四棱锥
和正四棱柱
构成的组合体,正四棱锥的侧棱长为6,
为正四棱锥高的4倍.当该组合体的体积最大时,点
到正四棱柱
外接球表面的最小距离是
![](https://img.xkw.com/dksih/QBM/2020/5/12/2461211996626944/2461863669440512/STEM/ee1762c5-f669-48ee-ba3d-bc198cba8987.png?resizew=141)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724625d4f91f0e48712d6d143a6389b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://img.xkw.com/dksih/QBM/2020/5/12/2461211996626944/2461863669440512/STEM/ee1762c5-f669-48ee-ba3d-bc198cba8987.png?resizew=141)
A.![]() | B.![]() | C.![]() | D.![]() |
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2020-05-13更新
|
1500次组卷
|
6卷引用:广西北海市2021届高三第一次模拟考试数学(理)试题