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Circle constant (π)

The circle constant π = 3.1415… describes the ratio between the circumference and the diameter of a circle

π =   circumference 
     diameter 

 


Explanation

One quintillion figures after decimal point were already computed, and there never develops a pattern that is repeated. Mathematicians proved that this will never happen, and therefore call it a transcendental number.

It is an important number, and plays a role in many calculations that deal with circles, waves and movements.

 


Example 1

A calculation with the number π gives

π + π = 2π

 


History

In 1882, the German mathematician Ferdinand von Lindemann proved that pi is a transcendental number.


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