名校
解题方法
1 . 如图:等边三角形的边长为3,
,
.将三角形
沿着
折起,使之成为四棱锥
.点
满足
,点
在棱
上,满足
.且
.
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0e825de4e5ade72e45a28c8f75b1dea.png)
(2)求面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ed0f4fa153785d68b599f658c20e5e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abe5f91935f79a9a922751453e0d32a3.png)
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34c932cfbb9fb63159a176a8f45489a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/177fbdd01ed1452f20ef05693156020e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abe5f91935f79a9a922751453e0d32a3.png)
您最近一年使用:0次
1 . 如图:等边三角形的边长为3,
,
.将三角形
沿着
折起,使之成为四棱锥
.点
满足
,点
在棱
上,满足
.且
.