记
的内角A,B,C的对边分别为
,
,
,若
,
,则A=( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3c442579603164f3fc19458677d307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66b33aaecbc2e7ab0f3276126142a95.png)
A.![]() | B.![]() | C.![]() | D.![]() |
2024·江西赣州·二模 查看更多[3]
江西省赣州市2023-2024学年高三下学期5月适应性考试数学试题(已下线)专题05解三角形压轴小题归类(1) -期末考点大串讲(苏教版(2019))河南省信阳市新县高级中学2024届高三考前数学仿真冲刺卷三
更新时间:2024-06-11 17:20:04
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单选题
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适中
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【推荐1】在
中,角
,
,
所对的边分别为
,
,
,且
,
,
,则
的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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适中
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解题方法
【推荐2】如图所示,矩形
中,
为边
的中点,将
沿直线
翻转成
,若
为线段
的中点,则在
翻转过程中,则下列命题错误的是( )
![](https://img.xkw.com/dksih/QBM/2021/1/16/2637225885147136/2637424483745792/STEM/5047c6c8a5e04b179a5edb6fea25680d.png?resizew=221)
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![](https://img.xkw.com/dksih/QBM/2021/1/16/2637225885147136/2637424483745792/STEM/5047c6c8a5e04b179a5edb6fea25680d.png?resizew=221)
A.![]() |
B.点![]() |
C.一定存在某个位置,使![]() |
D.一定存在某个位置,使![]() ![]() |
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