2).Introduction to pie(π)__. :::
The number π is a mathematical constant. Originally defined as the ratio of a
circle's circumference to its diameter, it now has various equivalent definitions
and appears in many formulas in all areas of mathematics and physics. It is
approximately equal to 3.14159 not a physical constant.
π appears routinely in describing fundamental principles of the universe, often
because π's relationship to the circle and to spherical coordinate systems. A
Simple formula from the field of classical mechanics gives the approximate
period T of a simple pendulum of length L, swinging with a small amplitude (g is the earth's gravitational acceleration):

Below is the 100 digits of pie which goes to infinite:-
3.141592653589793238462643383279502884197169399375105820974944592307816406286 .....................
The entire universe exists in pie.
Pie day is celebrated on 14 march and this day is also know as mathematical constant day or maths constant day.
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