Not sure what you mean by this^^^
Actually, I made a mistake.
'Pi' is an 'irrational' number.
Being an irrational number, it can't be represented as a common fraction. 22/7 is an approximation.
It's decimal representation never ends & never settles into a permanent repeating pattern.
As of 2011, with the power of a computer, the extended decimal representation of 'Pi' has been taken to 10 trillion non-repeating digits! (10 to the 13th power)
Scientific representations usually only need calculations of 'Pi' to 40 decimals.
'Pi' is also a transcendental number, which means that it is not the solution for any polynomial with rational coefficients.
'Pi' cannot be expressed using any combination of rational numbers &/or square roots.
The study of 'Pi', & it's earliest written approximations (within 1%!) has been found dating back to 1900-1600 B.C in Egypt & Babylon. Also in India from around 600 B.C.
People are still studying it today!
Your algebra/trigonometry lesson for the day! Lol!
The keyword here is 'approximate'.
http://www.youtube.com/watch?feature=player_embedded&v=1XFkAZW-rWg
This why GPS is such an improvement over the old method of calculating speed. It uses time & position to calculate speed.
The physical mechanical calculations do not apply.
