2023·江西·二模
名校
1 . 在直角
,中
上有一动点P,将
沿
折起使得二面角
,则当
最小值最小时,
为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/11/7467d3b3-99a0-41d9-920e-850d333a282b.png?resizew=154)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/336567101c910fb2854d068a0a52283f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/147de24f071e316b68fd2e78e3c84545.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5246d6e8f4b88c424619c835b64bdb44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e663220a66eff19da6a71e46b397db2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/11/7467d3b3-99a0-41d9-920e-850d333a282b.png?resizew=154)
A.![]() | B.![]() | C.2 | D.![]() |
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A.![]() | B.![]() | C.2 | D.![]() |