解题方法
1 . 如图,在四棱锥
中,
底面
,底面
是矩形,
,
,点
在棱
上,且
,则当
的面积取最小值时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/721e3242479386328d34750a38bd10d8.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.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/91ce0586aafd9bf4fb7e1be082624afc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/491c3a4f72b84ebadd28b90711435adc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe657996fea451eca0609ab23106e768.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0e2d85a6b3c59d3d0309277aa168c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/721e3242479386328d34750a38bd10d8.png)
![](https://img.xkw.com/dksih/QBM/2021/4/15/2700235661049856/2700514734735360/STEM/3c040103-1cde-4e24-8110-767348f98775.png?resizew=191)
您最近一年使用:0次
解题方法
2 . 已知两个圆锥有公共底面,且两个圆锥的顶点和底面的圆周都在同一个球面上,若圆锥底面面积是这个球的表面积的
,则这两个圆锥中,体积较小者的高与体积较大者的高的比值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/295f5c22f2b562bce2f502dd66f31752.png)
您最近一年使用:0次
解题方法
3 . 某圆锥母线长为4,其侧面展开图为半圆面,则该圆锥高为________ .
您最近一年使用:0次