How do i find history about a mathematics sign called pie?
http://en.wikipedia.org/wiki/Pi History Main article: History of π [edit] Use of the symbol π Often William Jones’ book A New Introduction to Mathematics from 1706 is cited as the first text where the Greek letter π was used for this constant, but this notation became popular especially since Leonhard Euler adopted it some years later, (cf. History of π). [edit] Early approximations Main article: History of numerical approximations of π. The value of π has been known in some form since antiquity. As early as the 19th century BC, Babylonian mathematicians were using π=25/8, which is within 0.5% of the true value. The Egyptian scribe Ahmes wrote the oldest known text to give an approximate value for π, citing a Middle Kingdom papyrus, corresponding to a value of 256 divided by 81 or 3.160. It is sometimes claimed that the Bible states that π=3, based on a passage in 1 Kings 7:23 giving measurements for a round basin as having a
