在矩形
中,
,且点E,F分别是边
的中点,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/188a6f4bc099bce7d8e89e292f00e84d.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6ff436f477b41184243d974f4a0b65f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/481e426224c3a3ce9bb5a731eed81c40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/188a6f4bc099bce7d8e89e292f00e84d.png)
更新时间:2023-06-02 10:23:22
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