The similarity in appearance between the symbol pi and the Roman numeral II is entirely coincidental.
I don't know how to represent the symbol here on WikiAnswers, but you can see it here: http://en.wikipedia.org/wiki/Pi
"Pi" is the symbol almost always used to represent the ratioof the circumference of any circle to its diameter.
The symbol for pi (π), is the Greek letter that is the equivalent to the Roman p. It is the Greek letter pi. It is the first letter of the Greek word περίμετρος (perimetros) from which our word perimeter comes.
Mathematician Rudolph Swetchefriz{Added} The symbol is not "for" pi but is pi - one of the letters of the Greek alphabet.
Because pi is an irrational number that has an infinite amount of digits
The similarity in appearance between the symbol pi and the Roman numeral II is entirely coincidental.
Archimedes
I don't know how to represent the symbol here on WikiAnswers, but you can see it here: http://en.wikipedia.org/wiki/Pi
"Pi" is the symbol almost always used to represent the ratioof the circumference of any circle to its diameter.
Leonhard Euler used the symbol pi in 1737.
The symbol for pi (π), is the Greek letter that is the equivalent to the Roman p. It is the Greek letter pi. It is the first letter of the Greek word περίμετρος (perimetros) from which our word perimeter comes.
He was responsible for instituting the use of the symbol pi.
Yes, if you're calculating circumference from radius or diameter. Pi is the symbol used to represent the ratio of circumference to diameter of any circle: pi = c/d This can also be written as c = pi*d. And has been noted, pi is approximately 3.14
Mathematician Rudolph Swetchefriz{Added} The symbol is not "for" pi but is pi - one of the letters of the Greek alphabet.
the first person to use pi was the amazing thomas paul pearson
pi is a symbol that we all use and it looks something like this....