我国汉代数学家赵爽为了证明勾股定理,创作了一幅“弦图”,后人称其为“赵爽弦图”(如图①),图②由弦图变化得到,它是由八个全等的直角三角形和一个小正方形拼成.若正方形EFGH的面积为2,则正方形ABCD和正方形MNKT的面积之和为( )
![](https://img.xkw.com/dksih/QBM/2021/1/8/2631729636483072/2639322946854912/STEM/71d5350d-c021-4f8f-9655-b7f5887da7de.png)
![](https://img.xkw.com/dksih/QBM/2021/1/8/2631729636483072/2639322946854912/STEM/71d5350d-c021-4f8f-9655-b7f5887da7de.png)
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更新时间:2021-01-19 00:59:11
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【推荐1】已知直角三角形的周长为
,斜边为2,则该三角形的面积是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb78d18c78218dc4b4925a1721f2be1.png)
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【推荐2】如图,在四边形
中,
,分别以四边形的四条边为边向外作四个正方形,若
,
,则
( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/30/1f4dfcaa-d951-49b5-801e-a34faa394dc0.png?resizew=181)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b165a33a59f77dbbbf8c75cd27af74d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79181da8c3463a9606783f72f93e4998.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e88f47248cab86cf647b670da921be6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1b625192d7398634a02ea24fa78ed87.png)
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【推荐1】“赵爽弦图”巧妙地利用面积关系证明了勾股定理,是我国古代数学的骄傲,设直角三角形较长直角边长为
,较短直角边长为
.若
,大正方形的面积为
,则
的长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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【推荐2】如图,利用四个全等的直角三角形拼成的“赵爽弦图”中,小正方形的面积是1,大正方形的面积是25,直角三角形中较大的锐角为
,则tan
=( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/4/0c4c7ded-40ac-40dc-b97c-88aaaba6b6ab.png?resizew=80)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
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