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1 . 据《九章算术》记载,商高是我国西周时期的数学家,曾经和周公讨论过“勾3股4弦5”的问题,比毕达哥拉斯早500年.如图,现有
满足“勾3股4弦5”,其中
,
,点
是
延长线上的一点,则
=( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/bbb06332-1e99-481d-bf3c-b2cb766b65d8.png?resizew=185)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc603ed06b61fa3bca49e878600d91b6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/bbb06332-1e99-481d-bf3c-b2cb766b65d8.png?resizew=185)
A.3 | B.4 | C.9 | D.不能确定 |
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2020-05-27更新
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5卷引用:2020届湖北省七市(州)教科研协作体高三下学期5月联合考试文科数学试题