中国古代数学家赵爽设计的“弦图”蕴含了丰富的数学知识.如图,在由四个全等的直角三角形(
,
,
,
)和中间一个小正方形
拼成的大正方形
中,若
,则正方形
与正方形
的面积的比值为( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63b43490ca09467a4c8cd8cfe91c94e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/004104bafb5f30338123d4ea2b7fedde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bc1b68f13fed987f5209197de7bc8b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c768dedaea22607617398ce28a02dd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
A.![]() | B.![]() | C.5 | D.![]() |
更新时间:2024-05-28 09:42:27
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【推荐1】如图,
,
交于点O,有下列三个结论:①
,②
,③
.则一定成立的有( ).
![](https://img.xkw.com/dksih/QBM/2021/7/30/2775455172902912/2776216645754880/STEM/1029a6fe-ca29-4a4c-988c-2652d48ab0e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b89fef6d8f41e7effb470541d3fa2ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
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A.0个 | B.1个 | C.2个 | D.3个 |
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【推荐2】将三个全等的三角形按如图所示的方式摆放,则
的度数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/3a8792d5-45e4-4bba-91a2-569228b6f292.png?resizew=138)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fa79414bb776864b939b060f4ec4315.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/3a8792d5-45e4-4bba-91a2-569228b6f292.png?resizew=138)
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【推荐1】如图,
中,
,
,
于点D,若点E是线段
上一动点,则
的最小值为( )
![](https://img.xkw.com/dksih/QBM/2023/5/21/3242502011953152/3242724168818688/STEM/d246e77df18442e6acc0537ddf327e55.png?resizew=164)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eeb0c8df3d8c5260768c5e407b3583a.png)
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名校
【推荐2】如图,已知直线
交
轴,
轴于点
,点
是
上的点,以
为边作正方形
恰好落在
上,已知
,则
的值为( )
![](https://img.xkw.com/dksih/QBM/2020/7/6/2500183930576896/2501481542287360/STEM/ac10dddd8fde457f89f7702d2ca18830.png?resizew=226)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b3ab62533cc2ca5e3ad866c18fb0175.png)
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