已知
中,角A,B,C的对边分别为a,b,c,
的面积为
,且
.
(Ⅰ)若
,求
的外接圆的半径;
(Ⅱ)若
,
,AD为BC边上的中线,求
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aff5d7408de47526aac9fa1bb51ef81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aff5d7408de47526aac9fa1bb51ef81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c883e5c1adf916eb2eb39b03da98b7a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/281901b9301527b28291bafcc28882b9.png)
(Ⅰ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aff5d7408de47526aac9fa1bb51ef81.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ae7888d643678ea18f83f3237732052.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09c0f3fc0be2d69197789a18bab1c0de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c926b340bd0913f3fab4580a40978b3.png)
更新时间:2018-12-04 10:09:59
|
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解答题-问答题
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适中
(0.65)
解题方法
【推荐1】在△ABC中,内角A,B,C所对的边分别为a,b,c,已知
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【推荐2】已知平面四边形ABDC中,对角线CB为钝角
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解答题-问答题
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适中
(0.65)
名校
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【推荐1】在
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(1)求角A的大小;
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd7d933b51a7f0cdd7767ae6adc8a402.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f08ce80e91fdf435a8e3ec05be990e9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8af097c5944be429ff3fe40dfd112d7.png)
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1479dfdcc1ebe156f163c06fef53aae1.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.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/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
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![](https://img.xkw.com/dksih/QBM/2014/5/22/1571735511040000/1571735516758016/STEM/dedf73cdfe744e5281333e1f524718f0.png?resizew=97)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f08ce80e91fdf435a8e3ec05be990e9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d447455ca3fa23710faaa4bd6b5d7c8.png)
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