如图,
为菱形
的对角线,作
于点E,交
于点F.若E为
的中点,则
的值是_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e3f5dc11efe60b4fd9a13b1d6b83842.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ce23690ed995b8b87b687e053a768b2.png)
![](https://img.xkw.com/dksih/QBM/2021/5/17/2723211810816000/2741459662807040/STEM/aa27d23a-b60c-49b0-9e02-445480ab4ff3.png)
更新时间:2021-06-12 16:16:52
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