△BDE和△FGH是两个全等的等边三角形,将它们按如图的方式放置在等边三角形ABC内,若求五边形 DECHF的周长,则只需知道( )
![](https://img.xkw.com/dksih/QBM/2021/11/18/2853844538286080/2859518233018368/STEM/d88ac452-7f88-4132-974b-3735aaef0c9a.png)
![](https://img.xkw.com/dksih/QBM/2021/11/18/2853844538286080/2859518233018368/STEM/d88ac452-7f88-4132-974b-3735aaef0c9a.png)
A.△ABC的周长 | B.△AFH的周长 |
C.△BDE或△FGH的周长 | D.四边形ADEC的周长 |
更新时间:2021-12-01 11:42:20
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