“一切平面图形中最美的是圆形.”圆以它的匀称、稳定、和谐给人以美感.大至宇宙,小至粒子,无处没有它的存在.车轮的转动既平稳又省力;下水道的窨井盖,怎么放也不会掉下去;建筑中圆的造型,形成了独特的风格…圆的计算离不开圆周率.圆周率的精确度曾经是我国古代数学界的骄傲南 “The most beautiful thing in all plane graphics is the circle.” The circle gives it a sense of beauty with its symmetry, stability, and harmony. It is as large as the universe, as small as particles, and everywhere without its existence. The rotation of the wheels is both smooth and effortless; the sewer The manhole cover of the well, how to put it will not fall; the shape of the circle in the building, forming a unique style ... The calculation of the circle can not be separated from the pi. The accuracy of the pi was once the pride of the ancient mathematics circles in our country.