现今,大家所以都用π来表示圆周率,是因为与它的发展历史有着密切关系的。今将其发展情况简介如次: 我国古代,人们通过大量的实践,就认识了圆周率,并估计出圆的周长是其直径的三倍。如刘徽(三世纪)注《九章算术》说:“周三径一之率”。后人便把这一值称为古率。刘徽由于对古率不满,就创造了割 Nowadays, everyone uses π to express pi because of its close relationship with its history of development. Today’s brief introduction of its development is as follows: In ancient China, people realized pi through a lot of practice, and estimated that the circumference of a circle is three times its diameter. Such as Liu Hui (third century) note “Nine chapters of arithmetic,” said: “The rate of one on Wednesday.” Later generations called this value the ancient rate. Liu Hui created a cut due to dissatisfaction with ancient times.