一张等腰三角形纸片,底边长l5cm,底边上的高长22.5cm.现沿底边依次从下往上裁剪宽度均为3cm的矩形纸条,如图所示.已知剪得的纸条中有一张是正方形,则这张正方形纸条是( )
![](https://img.xkw.com/dksih/QBM/2013/6/6/1573661667262464/1573661673267200/STEM/1e9bdb38d17645d39546bf587f3011ec.png)
![](https://img.xkw.com/dksih/QBM/2013/6/6/1573661667262464/1573661673267200/STEM/1e9bdb38d17645d39546bf587f3011ec.png)
A.第4张 | B.第5张 | C.第6张 | D.第7张 |
更新时间:2016-12-05 18:05:46
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【推荐1】如图,平行四边形ABCD中,E是AB的中点,CE和BD交于点O,如△ODC的面积为4,则四边形AEOD的面积是( )
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【推荐2】在
中,
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【推荐2】已知△ABC的三条边长分别为3,4,6,在△ABC所在平面内画一条直线,将△ABC分割成两个三角形,使其中的一个是等腰三角形,则这样的直线最多可画( )
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