在
中,
是
边上的高线,
是
边上的中线,
是
的中点,
.
(1)求证:
.
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b41d4070854edfaa24071137b314cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9171484a68c84cad91e4f2233392f600.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cabd5c0627cb02060b4dbcbcff69dad1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/30/02287dd1-57f2-488b-8826-48322cd02b73.png?resizew=223)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91303b2b7d81e5f7f4d167d2be520da1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8feb9fdc5582ad3e9853890ac2738d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3787e88ccc5f3a4ea0a00922010784f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b41d4070854edfaa24071137b314cb.png)
更新时间:2023-07-24 20:13:57
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