名校
解题方法
1 . 在
中,
为
上一点,满足
,且
.
(1)证明:
.
(2)若
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d78524f98b01fa1dadfd277939665b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de47573a39d8540ed1ae433628fcdca0.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7749006d7e99bbec95b12e044bf8f87b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3128a88bb559e5166b54e7250bb5c083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5cb63aeea0b37799404c8fec092b21d.png)
您最近一年使用:0次
2023-11-14更新
|
590次组卷
|
3卷引用:山东省聊城市2023-2024学年高三上学期期中数学试题
2 . 记
的内角
的对边分别为
,已知
,
是边
上的一点,且
.
(1)证明:
;
(2)若
,求
.
![](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/0a9069499bd3bd7cc7112eb42d8984f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62a3bf6da4d9823ceaf3ec8b03b44de7.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41ca7e840268b42f41ce1975962382c2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8cabcef1cee1213140371c499339864.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ba1883c53ebf30a9e53e9b7f3bce4ba.png)
您最近一年使用:0次
2023-03-21更新
|
1288次组卷
|
3卷引用:河北省衡水中学2023届高三下学期一调数学试题
解题方法
3 . 如图,在四边形
中,E为
上一点,若
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/5/cb3ede3d-a813-4b38-b465-59aa632c972d.png?resizew=171)
(1)求证:
;
(2)若
,求四边形
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99ab3bdca62b4ef50a82eee4f194ce33.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/5/cb3ede3d-a813-4b38-b465-59aa632c972d.png?resizew=171)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf1a295da4be97f4601b2d06a7c077fd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5074059ab695965a2e478a5eeea6f81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次