Here when I talk about the word Pi I am talking about the mathematical constant π whose value is 3.14159265359……. and on and on it goes. Now one confusion I’d like to clear is that pi is not equal to 22/7 but this ratio is quite close to pi and that’s why it’s called irrational (we can’t represent it in terms of a ratio of two numbers).
What is pi?
Mathematically, it is the circumference divided by the diameter of a circle.
Before talking about its importance, I would like to highlight the history behind this number.
A BRIEF HISTORY OF PI:
It’s a really old number. Its history dates back to over 4000 years among the ancient Babylonians. They used to calculate the area of the circle to be 3 times the square of the radius. So the value of pi at that time came to be around 3.
But the major breakthrough regarding this number came from Archimedes who calculated the area of the circles by inscribing polygons within and outside the circle and finding out the area of those polygons. So the area of the circle had to be between the outside polygon and inside the polygon. He had shown that π is between 3 1/7 and 3 10/71
The symbol pi was used to denote this constant way after around 1707 by Mathematician William Jones but it was actually popularized by the Swiss mathematician Leonhard Euler.
As time went on the digits behind pi kept on increasing as our approximation improved. Eventually, computers were developed and now there is are billions of digits of pi calculated.
Now, here comes the important part where I mention the importance of pi and why it has gotten such popularity.
USED IN VARIOUS FORMULAE AND HAS LOTS OF AREAS OF APPLICATIONS:
Pi is used very much in the field of mathematics and physics too. The most famous formula includes calculating the area of the circle. Instead of me writing about its applications I will just give you guys the link where you can look it up.