如图,
,要使
,则需![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cc310194575262fb45352c2fbc19868.png)
___________
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7fbd8ec5f6f85e7bccc0c51a0a91f1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cc310194575262fb45352c2fbc19868.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
更新时间:2024-04-30 09:10:35
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【推荐1】如图,直线a、b、c两两相交,∠1=2∠3,∠2=60°,则∠4=________ .
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