1 . 如图平面四边形
,
的内角A,B,C的对边分别为a,b,c,已知
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/849af345-0a8e-40e4-9de8-ba3cd77caafd.png?resizew=134)
(1)求
;
(2)若
,
,
,求四边形
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83802d1d33afd29ac6252d905c7c466c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/849af345-0a8e-40e4-9de8-ba3cd77caafd.png?resizew=134)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b28f28ced0531d1df34fcf04c6c67f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfb08f6a798dc293f3d8de281190f65e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
2 . 如图,在平面四边形ABCD中,
,
,
,设
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/5710cd2e-954a-41f0-a1f2-514a4eebc5d0.png?resizew=221)
(1)若
,求BD的长度;
(2)若
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077c956ac0eb05cf120e14f17413dfa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683047ccdc77d3ba0bcbc3a036d3a187.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8cc5e8fc797a3a45c253b783631d4e9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/5710cd2e-954a-41f0-a1f2-514a4eebc5d0.png?resizew=221)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f72bf0fce80daad394f2a9d013829c5c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9228b213dc6b256b752b38a466ebec93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43660b1543b3a2b46185f7629d28a963.png)
您最近一年使用:0次
2020-05-08更新
|
869次组卷
|
4卷引用:2020届湖南省名师联盟高三上学期第一次模拟数学(理)试题
名校
3 . 如图,在直角
中,
,
,
,点
在线段
上.
,求
的长;
(2)点
是线段
上一点,
,且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90b40c2b0ab8e1cfe5112d428b4b829f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13ba5383e768dc86e1bfd79c10f96f4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f412528e223f268ec4f0f3e268ced80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16dd52062ef6e01018171bc45ddf4648.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bba7d52df3d2cf236d2a809fccbc8923.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/977531ee9d2fa2227e31096435b62372.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48bdafa1935788bb5bf3b87c3a0c342a.png)
您最近一年使用:0次
2020-04-24更新
|
4518次组卷
|
9卷引用:湖南省长沙市雅礼中学2020-2021学年高三上学期月考(二)数学试题
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