阅读材料:若
,求
、
的值.
解:∵![](https://staticzujuan.xkw.com/quesimg/Upload/formula/676454d1f3fe1077d1f544613af1572a.png)
∴![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a55868969a0dc619b0ece1423e2c9f33.png)
∴
,
∴
,
,
∴
,
.
根据你的观察,解答下面的问题:
(1)已知
,求
的值;
(2)已知
、
、
为
三边,且
,判断
的形状.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ea4431eb0d74b2ee298f027e71cb967.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
解:∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/676454d1f3fe1077d1f544613af1572a.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a55868969a0dc619b0ece1423e2c9f33.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00b075f027a40f9e4f15d481eb20aec4.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a2e94026e72e6dab46295c229905369.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98912998556ef3f2907bee2a7531dc50.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fac3649308b528fd56545ba102dc42d5.png)
根据你的观察,解答下面的问题:
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cef8e984f930ce80f824533a797bb020.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f29d5f376c75c41ae6af0c8a8565449.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd8c37b361428021327d8b8c8620546f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
更新时间:2022-12-20 09:35:47
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