解题方法
1 . 根据毕达哥拉斯定理,以直角三角形的三条边为边长作正方形,从斜边上作出的正方形的面积正好等于在两直角边上作出的正方形面积之和,现在对直角三角形
按上述操作作图后,得如图所示的图形,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d23f8845e7753986cdf27ec47ad465c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5113986d9507fc5015e71989831c128b.png)
A.![]() | B.![]() | C.![]() | D. ![]() |
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解题方法
2 . 如图,在射线
中,相邻两条射线所成的角都是
,且线段
.设
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/55f049d5-51f6-4b51-b8b5-c97afc1b02df.png?resizew=420)
(1)当
时,在图1中作出点
的位置(保留作图的痕迹);
(2)请用
写出“点
在射线
上”的一个充要条件:___________;
(3)设满足“
且
”的点
所构成的图形为
,
①图形
是___________;
A.线段 B.射线 C.直线 D.圆
②在图2中作出图形
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84c83984c62d390c6b30efa5d4e560de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/231b861d6d1f1d0b9f52b041cb40eb62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/242b14a89363fa1e1a3b74ed989a5311.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84bc6a7f6fc168aa7e9806853fe6b795.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/55f049d5-51f6-4b51-b8b5-c97afc1b02df.png?resizew=420)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ffa40548128db9ca7b7e552d3de675d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)请用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
(3)设满足“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20b8d3564d7ae5687f69b64b150c4b35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8efd32ba5030535598e979fd6d3a4d5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
①图形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
A.线段 B.射线 C.直线 D.圆
②在图2中作出图形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
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