已知
的三边分别为
,
和
,试求
最大内角的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f08ce80e91fdf435a8e3ec05be990e9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65f9c88edac18a30697feb5a9956b70b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2033f18cafb5d3df000b7f66bd415658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
22-23高一·全国·课堂例题 查看更多[2]
更新时间:2023-10-02 14:47:33
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【推荐1】
的内角A,B,C的对边分别为
,已知
.
(I)求B;
(II)若
的周长为
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc98ebe9ea4f030abe13aab644e41f1f.png)
(I)求B;
(II)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d604554fa11916cf335a5272e088dd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd17f4ae14c8152a63dc65210ee147d8.png)
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(0.85)
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【推荐2】某市一棚户区改造用地平面示意图如图所示.该区域是半径为
的圆面,圆面的内接四边形
是原棚户区建筑用地,测量可知
.
![](https://img.xkw.com/dksih/QBM/2022/4/1/2948701487620096/2951693910417408/STEM/fe87266c-1d20-41f5-a3cb-52dac41d953e.png?resizew=155)
(1)求原棚户区建筑用地
中对角线
的长度;
(2)请计算原棚户区建筑用地
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a772bb9b721e78d3a8d653f9a9ed9c5.png)
![](https://img.xkw.com/dksih/QBM/2022/4/1/2948701487620096/2951693910417408/STEM/fe87266c-1d20-41f5-a3cb-52dac41d953e.png?resizew=155)
(1)求原棚户区建筑用地
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)请计算原棚户区建筑用地
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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