解题方法
1 . 长方体的长宽高分别为
、
、
,其八个顶点在同一个球面上,则此球的表面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
2 . AB是⊙O的直径,PA垂直于⊙O所在的平面,C是圆周上异于A、B的任意一点,连结PC,PB,AC,BC,得到四个三角形,其中直角三角形的个数为( )
A.1 | B.2 | C.3 | D.4 |
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名校
解题方法
3 . 设
、
是两个非零向量,则下列描述正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
A.若![]() ![]() ![]() |
B.若![]() ![]() |
C.若![]() ![]() ![]() ![]() |
D.若存在实数![]() ![]() ![]() |
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2023-07-30更新
|
279次组卷
|
5卷引用:第六章 平面向量初步核心素养单元测试定心卷-2021-2022学年高一上学期数学人教B版(2019)必修第二册
4 . 在
中,
,
,
,点
在线段
上,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c978d92edf0c4c1ef8620c17df75d35e.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.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/5489aaa6dc00789fcf126bf2fd744a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c978d92edf0c4c1ef8620c17df75d35e.png)
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5 .
中,
,且
,
,则
的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe7a93172d308a58200e3c722fe1072.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37b9595ad4a08bfdb07f3014076e753a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5742b2684d00be50a66e01c9acb6b51f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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6 . 在
中,角
所对的边分别为
,
,
的平分线交
于点
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b4a1e56da3635e24d4e1e15e38f192e.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e918b70b02a73685e3c536c7f380e2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.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/dfb08f6a798dc293f3d8de281190f65e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b4a1e56da3635e24d4e1e15e38f192e.png)
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7 . 在
中,
,
的面积为2,则三角形外接圆的半径为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3296a2bae78a5c1300c317dc070b33c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2023-07-30更新
|
482次组卷
|
3卷引用:第九章 解三角形 单元测试
解题方法
8 . 在
中,内角A,B,C的对边分别为a,b,c,已知
.
(1)求角
的大小;
(2)若
,求
的周长l的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3706eb7893966651ccae124623fecc4.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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解题方法
9 . 在正方体
中,
分别是
上的点,
求证:
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b2dd932360315549ac9720de1369b3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6670479a0083dd2dfd5ad55b47b1ab6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e41961f19af2d8861047899f1a83ae4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea3581bd9e4e8591c58a17fd43538469.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd19c4db61254be8512edf741bf9f978.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b2dd932360315549ac9720de1369b3a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/1/6ea1d8be-d000-4b7c-9074-228f773198f0.png?resizew=151)
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10 . 设圆台的上底面和下底面的半径分别为
和
,母线长为
,则该该圆台的高为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c0f55f0de096441577609c3e8be17fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8176754726d2194c890e80df1a1f1c3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8bc6928ed8e05cbc566fd502fb17fab.png)
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2023-07-29更新
|
462次组卷
|
4卷引用:第十一章 立体几何初步单元测试题
第十一章 立体几何初步单元测试题上海市金山区2024届高三上学期质量监控数学试题(已下线)第02讲 8.1基本立体图形(第2课时)(1)-【帮课堂】(人教A版2019必修第二册)(已下线)信息必刷卷05(上海专用)