勾股定理是我国古代的伟大数学发明之一,如图,
,以
的各边为边向外作正方形,得到三块正方形纸片,再把较小的两张正方形纸片放入最大的正方形中,重叠部分的面积记作S1,左下不重叠部分的面积记作S2,若
,则
的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b87f29eb9f50eb069e9d14316dbaff3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
A.1 | B.2 | C.3 | D.4 |
更新时间:2024-04-23 09:21:18
|
【知识点】 以直角三角形三边为边长的图形面积
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【推荐1】“赵爽弦图”是由四个全等的直角三角形与一个小正方形拼成的一个大正方形,如果小正方形的面积为1,大正方形的面积为13,直角三角形中短直角边a,较长直角边为b,那么
的值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/8/fdc09a53-5bbb-4cee-a006-26e636fc23df.png?resizew=129)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/118933cede78675413dbafac24ee008c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/8/fdc09a53-5bbb-4cee-a006-26e636fc23df.png?resizew=129)
A.13 | B.14 | C.25 | D.169 |
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【推荐2】如图,点A,B,C在同一条直线上,点B在点A,C之间,点D,E在直线AC同侧,
,
,
,连接DE,设
,
,
,给出下面三个结论:
①
;
②
;
③
.
上述结论中,所有正确结论的序号是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d09a9a6f020159406608000cf93d4fa9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/853e81b1b9606ad25244ff82c8292df6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f925f45b71f457f3fa19203360a287.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d42e97eee705d164e6ac6de9ecd6d1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4a88b719166fcc1431f876bc8c5656c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fd764314ae7afde76f32918f79ccc84.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b8071e5c19f30589b7fbf6639835472.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df337f2eff7f81da8cf7d52ba803d006.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/849acfa7c48106a952b00f0e38d2572d.png)
上述结论中,所有正确结论的序号是( )
A.① | B.①③ | C.②③ | D.①②③ |
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