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把一张长方形纸片对折一次，再对折一次，打开，每份是这张纸片的 ．
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把一张长方形纸的纸片对折3次每份是这张纸的
把一张长方形纸的纸片对折4次每份是这张纸的
将正方形纸片如图所示由下往上对折再由左向右对折称为完成一次操作.按上述规则完成五次操作以后剪去所得小
如图取一张长为a宽为b的长方形纸片将它对折两次后得到一张小长方形纸片若要使小长方形与原长方形相似则
a＝
b
a＝2b
a＝2
b
a＝4b
在图中将一张长方形纸对折就将这张长方形纸平均分成2份．如果将一张长方形纸连续对折2次就将这张长方形纸
把一张长方形纸对折再对折每份占这张纸的．
把一张长方形纸的纸片对折4次每份是这张纸的
把一张长方形纸连续对折两次每份是这张纸的．
把一张长方形纸的纸片对折3次每份是这张纸的
把一张长方形纸的纸片对折3次每份是这张纸的
把一张长方形纸对折后每份是这张长方形纸的几分之几把这张长方形纸再对折两次后每份是这张长方形纸的几分
把一张长方形纸片对折后再对折两条折痕可能
互相平行
互相垂直
平行也可能垂直
把一张长方形纸的纸片对折4次每份是这张纸的
如图将一张长方形纸片对折两次然后剪下一个角打开.如果要剪出一个正方形那么剪口线与折痕成
22.5°角
30°角
45°角
60°角
将一张长方形纸片只折一次使得折痕平分这个长方形的面积这样的折纸方法共有A.2种B.4种C.6种D.无
把一张长方形纸的纸片对折4次每份是这张纸的
如图所示将一张长方形的纸片连续对折对折时每次折痕与上次的折痕保持平行对折一次得到1条折痕图中虚线对折
将一张正方形纸片对折一次沿直线剪切一刀后再将剩余部分摊平则这个摊平的图形不可能是
正方形
等腰三角形
直角三角形
长方形
把一张长方形纸上下对折一次后再左右对折打开后折痕
相互平行
相互垂直
无法判断
将一张长方形纸片对折可得到一条折痕．继续对折对折是每次折痕与上次折痕保持平行那么对折n次后折痕的条
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b a＝2b a＝2
b a＝4b
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