如图,在△ABC中AB=AC,BD=CE,BE=CF,若∠A=40°,则∠DEF=______ 度.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/31/86561fa8-7564-4034-89b5-4605446302b9.png?resizew=166)
更新时间:2020-12-28 22:53:58
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