解题方法
1 . 如图,在圆内接
中,角A,B,C所对的边分别为a,b,c,满足
.
![](https://img.xkw.com/dksih/QBM/2021/11/17/2853474301329408/2895082294108160/STEM/eae41d6b-2d9f-4ed0-8748-fdda0b0701be.png?resizew=166)
(1)求B的大小;
(2)若点D是劣弧
上一点,
,
,
,求线段AD的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef5bbec22aa4a92538aa16584fee7714.png)
![](https://img.xkw.com/dksih/QBM/2021/11/17/2853474301329408/2895082294108160/STEM/eae41d6b-2d9f-4ed0-8748-fdda0b0701be.png?resizew=166)
(1)求B的大小;
(2)若点D是劣弧
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/667349d99185bb045030b733352ff7fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb5bac75f36bb1dc5c8190d4dbe681d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6bc78a7cf048b4a4c2a34cfb2cbe08d.png)
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解题方法
2 .
的内角
的对边分别为
,已知![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f58a2532030e115581096290b7a4902f.png)
(1)求B;
(2)若
的面积为
,求
的周长.
![](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/f58a2532030e115581096290b7a4902f.png)
(1)求B;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ab0de648f58c73e9491d623d2246f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edb57d84f9bbcb3e30d4ce7e2e1e8604.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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