列方程解几何题是常用解题方法:如图 1,
中,
比
长1,
,求
的长.
解:设
为
,则
. 在
中,
,列方程得:_________ 解得:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
_________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d240fd030aa15794db991b872a0de465.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2fad691284c22aeffe2abfaeba0391c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
解:设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/012d58346e5fcdd50bc3079bf163f61b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecad0de0114928776980ef15a39a65ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
2021九年级上·江苏·专题练习 查看更多[2]
更新时间:2021-10-06 18:37:20
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【推荐1】如图,已知等腰
,
,
,
为
边上的高,将
绕点A顺时针旋转90°得到
(点D的对应点为点E,点C的对应点为点F).连接
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上一动点,将
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【推荐2】如图,在原点为
的数轴上,作一个两直角边长分别是
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
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