解题方法
1 . 如图,在正方体
中,二面角
的大小为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3da8c338342e38c9aa3f274c053fd5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/341e08a65211458b27ca505ccadfee32.png)
![](https://img.xkw.com/dksih/QBM/2022/4/22/2963715966074880/2972855891460096/STEM/58df43a2-d461-4a48-a023-31062b539bef.png?resizew=154)
您最近一年使用:0次
2 . 如图,已知长方体
中,
,
,则直线
与平面
所成的角大小为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0af405392c66b86550a58f1cb9868717.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f144992e1cbee34868abce1e5ad38c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d8eb4a9f462ca0c1d49c3fe91e720d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7775df7ba0dc94c15e9e706194a463f1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/2905f414-3a11-4291-b5d7-37d4c92e18ff.png?resizew=169)
您最近一年使用:0次
2020-02-04更新
|
161次组卷
|
2卷引用:上海市七宝中学2015-2016学年高二下学期期中数学试题