Ancient civilizations knew that there was a fixed ratio of circumference to diameter that was approximately equal to three. The Greeks refined the process and Archimedes is credited with the first theoretical calculation of Pi.
In 1761 Lambert proved that Pi was irrational, that is, that it can't be written as a ratio of integer numbers.
In 1882 Lindeman proved that Pi was transcendental, that is, that Pi is not the root of any algebraic equation with rational coefficients. This discovery proved that you can't "square a circle", which was a problem that occupied many mathematicians up to that time. (More information on squaring the circle.)
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To study about pi and its value , we will get more knowledge and the value of pi is either 3.14 or 22/7 . By studying it we can solve the problems regarding this and we should tell this to others an therefore we will get more knowledge about pi and its value.
3.141592654 pi
Pythagoras was credited with discovering the relationship of a radius with a circumference. Hence the term Pi (Pye).
The first person to calculate the mathematical constant pi was the ancient Greek mathematician Archimedes.