如图,在
中,点D是边
上一点,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a281cbf73b15f326e4f49cee81240181.png)
![](https://img.xkw.com/dksih/QBM/2022/3/11/2934043967733760/2938047420309504/STEM/cda9ff3a58fb4731bca4d308caf9bc3b.png?resizew=189)
(1)求
的大小;
(2)若
的面积为
,求边
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a281cbf73b15f326e4f49cee81240181.png)
![](https://img.xkw.com/dksih/QBM/2022/3/11/2934043967733760/2938047420309504/STEM/cda9ff3a58fb4731bca4d308caf9bc3b.png?resizew=189)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3de791c916f660a0e4318a6fbec0c1a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
更新时间:2022-03-17 10:15:41
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