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六年级同学都知道圆周率,不管一个圆有多大,它的周长和直径之比总是一个固定的数,它就是3.14159……这是一个无限不循环小数。我们把这个数叫做圆周率,用希腊字母π来表示。在几何问题中,圆周率π扮演着非常重要的角色,那么它的得来有着怎样的故事呢?“竭尽法”——早期的π历史上π首次出现于埃及。1858年,苏格兰一位古董商偶然发现了写在古埃及莎草纸(古埃及人广泛采用的书写介质)上的π的数值。莎草纸的主人从一开
Sixth grade students know the pi, no matter how large a circle, its ratio of perimeter to diameter is always a fixed number, it is 3.14159 ... This is an infinite non-recurring decimal. We call this number pi, expressed in Greek letter π. In the geometric problems, pi plays a very important role, then it comes to what kind of story? “Do it all” - π in the early history of π first appeared in Egypt. In 1858, an antique dealer in Scotland occasionally discovered the value of π written on ancient Egyptian papyrus, a writing medium widely used by ancient Egyptians. Master of the papyrus from the moment