边长为4的一个正方形和一个等边三角形如图摆放,则的度数为
更新时间:2024-03-31 12:47:39
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【推荐1】如图,四边形
内接于
,
、
的延长线相交于点E,
、
的延长线相交于点F,且
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce2a8bf5e05a07c93a7104839fc21849.png)
______
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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【推荐2】淇淇用图一的六个全等
纸片拼接图2所示的外轮廓是正六边形,如果用若干个
纸片按照图3所示的方法拼接成外轮廓是正n变形图案,那么的值为 __ .
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【推荐1】如图,
是边长为
的等边三角形,
是
上一点,
,
交
于点
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32217457c4e96e2ef155cf15c1b65d97.png)
_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐2】等边三角形的边长为a,则该等边三角形的面积为________ .(用含a的代数式表示)
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【推荐1】三个正方形方格和扇形
的位置如图所示,点O为扇形的圆心,格点A,B,C分别在扇形的两条半径和弧上,已知每个方格的边长为1,则扇形
的面积为_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2935a591c968df92a8cdd2bf09d96452.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2935a591c968df92a8cdd2bf09d96452.png)
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【推荐2】如图正方形
中,
是
边的中点,
与
相交于
点,正方形的边长
,则阴影部分面积为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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