论文部分内容阅读
在我小时候,教数学的姨夫曾给我出过一道题,让我只用一把直角尺画出一个面积为2平方厘米的正方形。那个年纪的我还没有学到开平方的概念,我怎么也想不通如何只用一把直角尺就能画出来,心想应该是1、4、9平方厘米之类才可以画呀。后来姨夫告诉我答案:先画一个4平方厘米的正方形,然后每边取中点,把相邻的点连起来,出现的就是一个2平方厘米的正方形了。我震撼得说不出话来。姨夫的用意大概是打压一下年少的我不知天高地
When I was a kid, my uncle, a math teacher, had given me a question that asked me to draw a square with an area of 2 square centimeters with only one square. At that age I have not learned the concept of Kaifang, how can I figure out how to use only a right foot can draw, I thought it should be 1,4,9 square centimeter before you can draw it. Later, my uncle told me the answer: first draw a square of 4 square centimeters, and then take a midpoint on each side, the adjacent points connected, there is a square of 2 square centimeters. I was so shocked that I could not speak. Uncle’s intention is probably to suppress the young I do not know the heights