名校
1 . 共和国勋章,是中华人民共和国最高荣誉勋章,授予在中国特色社会主义建设和保卫国家中作出巨大贡献、建立卓越功勋的杰出人士.2020年8月11日,国家主席习近平签署主席令,授予钟南山“共和国勋章”.某市为表彰在抗疫中表现突出的个人,制作的荣誉勋章的挂坠结构示意图如图,
为图中两个同心圆的圆心,三角形
中,
,大圆半径
,小圆半径
,记
为三角形
与三角形
的面积之和,其中
,
,当
取到最大值时,则下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/b6df9eb1-446d-446a-92f2-28d0c9322a98.png?resizew=173)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdfb51b3d43f2932f69317aa9a5067b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4819c39c281427826e1b3f7a4c2b720.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/597a3d2f88e3d391fc4e9a5131c290ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/b6df9eb1-446d-446a-92f2-28d0c9322a98.png?resizew=173)
A.![]() ![]() | B.![]() ![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2021-10-12更新
|
621次组卷
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5卷引用:江苏省南京市六校2020-2021学年高一下学期期末联考数学试题
名校
2 . 奔驰定理:已知
是
内的一点,
,
,
的面积分别为
,
,
,则
.“奔驰定理”是平面向量中一个非常优美的结论,因为这个定理对应的图形与“奔驰”轿车(Mercedesbenz)的logo很相似,故形象地称其为“奔驰定理”.若
、
是锐角
内的点,
、
、
是
的三个内角,且满足
,
,则( )
![](https://img.xkw.com/dksih/QBM/2021/7/10/2761151519342592/2764840447770624/STEM/087e51d1-5e63-4335-b97e-6fe598bc70e4.png?resizew=158)
![](https://img.xkw.com/dksih/QBM/2021/7/10/2761151519342592/2764840447770624/STEM/2ad46b81-7cce-42e8-a9f6-5f65b60a6e6c.png?resizew=190)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7ffcd1925a2b1259221c6a476152f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bbf9680f74a9ac5d934304654ce2771.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2319b6a5373bc8eb13772b8e6d047779.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ea3c7cd2f23b4521e64a7e64844ec48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/089e8a7f6c535fc3cd270af428d55f65.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec832bb20c7265239f8736ce3fdc18d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40018175912da0930709934b329766de.png)
![](https://img.xkw.com/dksih/QBM/2021/7/10/2761151519342592/2764840447770624/STEM/087e51d1-5e63-4335-b97e-6fe598bc70e4.png?resizew=158)
![](https://img.xkw.com/dksih/QBM/2021/7/10/2761151519342592/2764840447770624/STEM/2ad46b81-7cce-42e8-a9f6-5f65b60a6e6c.png?resizew=190)
A.![]() |
B.![]() |
C.![]() |
D.![]() |
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