在
中,已知
,
,且
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa4c355f11471a38f5583a434a1ddeb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ae7888d643678ea18f83f3237732052.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b96f3e2373808e8024a211b24c16519e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
18-19高一下·上海奉贤·期末 查看更多[2]
更新时间:2019-08-24 08:29:12
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相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】如图,在平面四边形ABCD中,∠BAD=60°,BD=
,cos ∠ABD=
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/5de63f4d-16ba-4f1d-8adc-65a90f6b0491.png?resizew=170)
(1)求AB的长;
(2)若∠BAD+∠BCD=180°,BC=1,求四边形ABCD的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/619096595112f0340a43b756e114dd3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/5de63f4d-16ba-4f1d-8adc-65a90f6b0491.png?resizew=170)
(1)求AB的长;
(2)若∠BAD+∠BCD=180°,BC=1,求四边形ABCD的面积.
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解答题-问答题
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名校
【推荐2】已知圆内接四边形ABCD的边![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1e0651a3b5438579eb8282dcbab0502.png)
(1)求角C的大小和BD的长;
(2)求四边形ABCD的面积及外接圆的半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1e0651a3b5438579eb8282dcbab0502.png)
(1)求角C的大小和BD的长;
(2)求四边形ABCD的面积及外接圆的半径.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/17/0d6d3245-7ba8-4e76-bf1f-58115cb7e5b8.png?resizew=131)
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解答题-问答题
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适中
(0.65)
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解题方法
【推荐1】已知a,b,c分别为
三个内角A,B,C的对边,且
.
(1)求A;
(2)若
的面积为
,a=3,求
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5667d09afb0fa7d66db5e4a1461672f2.png)
(1)求A;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f83dbfddc6f98548699ed581e8c8608.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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解答题-问答题
|
适中
(0.65)
名校
【推荐2】在平面四边形
中,
,
,
,
.
(1)若
,求
;
(2)若
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32436704a722d5e568ff5c175bf3c662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ab5c45a72849d2cae1d65b282b5bd19.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92fd64e4f9466e4642224aaf2d38b11b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/532aece6cfd67e2a97977eed978dbf2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
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