在平面直角坐标系中,已知点
,现将坐标平面沿x轴折成直二面角,则折叠后A,B间的距离为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9def1b19e760b66db84ac6e080a3c6bc.png)
更新时间:2022-12-16 20:04:08
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【知识点】 由二面角大小求线段长度或距离
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解题方法
【推荐1】一斜坡的坡面与水平面所成的二面角大小为
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