5厘米宽的纸6等分
- 时间:2020-05-27 19:09:25
- 分类:数学世界
- 阅读:171 次
把5厘米宽的纸6等分,这是一道小学六年级的作图题:有一把只有厘米没有毫米的尺子,要把一张5厘米宽的纸平均6等分,如何分?可要画5条线呵,纸没告诉你长度的。
过程描述(根据杨满川老师的回答整理):相当n等分线段问题。可以5厘米线段一端点为起点,向斜上方做一射线,在上顺次截取6个1厘米,得一线段,并作上中间的5个等分标记点。这是在纸的下方做出的标记,再换到纸的上方进行同样的操作,又得到5个标记点。最后连接上下方对应的各个等分点分别作长方形纸长边的的5条平行线,即为所求。(如下图所示)

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