We thought it would be fun to celebrate Pi Day this year at Pi Blogs, so I thought I’d write a post about pi.
Pi Day is celebrated every year on 14th March (03/14). It is also Albert Einstein’s birthday, which seems very appropriate.
I sat down with one of my bipeds to chat about what I could say about pi. I thought you all probably already knew that if you multiply the diameter of a circle by pi you get the circumference. And that pi is a very long number indeed, such a long number that no one knows how long! Then my thoughts began to drift.
I heard my biped ask, “What are you thinking about, Clowie?”
I answered, “Pie!”
She asked, “Why does thinking about pi make you drool?”
I replied, “Not pi, but pie, steak and kidney to be precise.”
She said, “Oh, I see. I’d prefer apple, or perhaps blackberry and apple. I like pumpkin pie as well.”
I gave her a look as this was hardly helpful! She suggested that we take a short break for refreshments to help focus our minds. That was a bit more helpful!
After my treat, I decided to look and see how bipeds celebrate Pi Day. Some of them have competitions to see how many digits of pi they can recite, but I was quite surprised to find that many of them celebrate with pi pies. They obviously have the same problem as I do – their minds keep turning to pie!
Grab a piece of whichever pie takes your fancy while I tell you a few more things about pi. It is sometimes called the Archimedes’ Constant because Archimedes was the first mathematician to devise a method of calculating pi. He proved that pi is between 223/71 and 22/7. Pi Approximation Day is celebrated on 22nd July, as 22/7 is still used as an approximation of pi.
The practice of memorising a large number of digits of pi is called piphilology. Pi has been calculated to trillions of decimal places, but that seems a little extreme when it’s said that thirty-nine digits are sufficient to calculate the volume of the known universe with the precision of one atom. (See motivations for computing pi.)
What do you get when you divide the circumference of the sun by its diameter? Pi in the Sky! You will find a Pi Day post there today.
Happy Pi Day!