解题方法
1 . 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
解题方法
2 . 如图,在四棱锥
中,侧面
底面
,底面
是平行四边形,
,
,
,
为
的中点,点
在线段
上.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0434c0177ca5c88ec129bd4cc13f4a1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62526e69e7c4e59d9df8a5b2c2426400.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/692300f1ba0c83d7ffd4d0c6f36c9232.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
(Ⅰ)求证:;
(Ⅱ)当三棱锥的体积等于四棱锥
体积的
时,求
的值.
您最近一年使用:0次
2017-05-16更新
|
1198次组卷
|
5卷引用:河北省曲周县第一中学2018届高三12月质量检测(四)数学(文)试题