如图,B、C、E共线AB⊥BE,DE⊥BE,AC⊥DC,AC=DC,又AB=2cm,DE=1cm,则BE=______ .
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/14/7f8e8ebf-34c6-4aff-a840-8610b3e9eb8d.png?resizew=147)
更新时间:2017-10-18 20:53:35
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