在日常生活中,人们经常与π打交道.自行车、汽车的轮胎是圆的,茶杯口是圆的,天上的月亮看起来也是圆的,圆的周长与直径之比是一个常数,这个常数就是π.当代数学大师、著名的美藉华裔数学家陈省身教授感慨道:“π这个数渗透了整个数学!”有的数学家甚至说:“历史上一个国家所算 In daily life, people often deal with π. The tires of bicycles and cars are round, the mouth of tea cups is round, and the moon in the sky looks round. The ratio of the circumference to the diameter of a circle is a constant. This constant is π. Contemporary mathematics master and famous American mathematician Chen Shengshen, a famous American mathematician, said with emotion: “The number of π permeates the whole mathematics!” Some mathematicians even said: “History is counted by a country.