Home / Events on 22 July / Pi Approximation Day

The **Pi Approximation Day** is celebrated on the 22^{nd} of July each year. Why? 22/7!

Pi (π) is the ratio of the circumference of a circle to its diameter and one can get its value accurate to two decimal places by dividing 22 by 7. Pi’s approximate value of 22/7 was probably proposed by Archimedes.

Using π, the sixteenth letter of the Greek alphabet, as the symbol for pi was first proposed by William Oughtred, an English mathematician and minister. Oughtred is also credited to have been the first to use ‘x’ as a symbol for multiplication. However, it was the great German mathematician, Leonhard Euler, who popularised the use of π.

The actual Pi Day is celebrated on 14^{th} of March which also happens to be the birthday of the great physicist Albert Einstein.

How do I view a deleted web page?

Is there a way to view a deleted web page - one that is no longer available? Yes there is and the solution is quite simple. [more...]

Before the iPad was formally announced by Steve Jobs on 27th January 2010, there were reliable speculations that Apple was about to launch a tablet. People called it iTablet or iSlate. [more...]

We use cookies to give you the best possible website experience. By using WebDevelopersNotes.com, you agree to our Privacy Policy