论文部分内容阅读
在一本小学六年级的奥数课本上有这样一个题:一张长10厘米,宽6厘米的长方形纸,按图1那样折叠,量得DF=3
In a sixth grade Mathematical Olympiad textbooks have such a question: a 10 cm long and 6 cm wide rectangular paper, folded as shown in Figure 1, the amount of DF = 3