Happy Pi Approximation Day!
Pi is a famous irrational number!
π = 3.1415926535…
The real Pi Day is on March 14th, so what’s with today?
Since Pi is an irrational number, that means it goes on forever, and ever… Such a long number is a little unwieldy to use in calculations. Now we have a π symbol on a calculator for easy use – but that wasn’t always the case! A popular approximation is the short and convenient fraction 22/7.
22/7 ≈ 3.142
The usage of this fraction is said to date back to Greek mathematician Archimedes.
July 22nd, when written in the in the day/month format, 22/7, looks just like the fraction!