INTERESTING PI FACTS

• Pi is an irrational number. It means that it cannot be written as the ratio of two integer numbers. 22/7 is a popular one used for Pi but it is only an approximation, which equals to 3.142857143...
• Another characteristic of pi as an irrational number is the fact that it takes an infinite number of digits to give its exact value, i.e. you can never get to the end of it.
• One of the most accurate fractions for Pi is 104348 / 33215. it is accurate to 0.00000001056%
• First 100 digits
  3.1415926535 8979323846 2643383279 5028841971 6939937510 5820974944 5923078164 0628620899 8628034825 3421170679 ...
• 1.2411 trillion digits (1,241,100,000,000) digits of pi have been dicovered
• You can determine your hat size by measuring the circumference of your head, then divide by Pi and round off to the nearest one_eighth inch.
• The height of an elephant (from foot to shoulder) = 2 * Pi * the diameter of its foot.
• The Babylonians, in 2000 B.C. were the first people known to find a value for Pi.
• Pi day is celebrated on March 14 at the Exploratorium in San Francisco (March 14 is 3/14) at 1:59 PST which is 3.14159.
• Pi Approximation Day is on the 22 / 7 - that is, July 22. For the past few years, people at Chalmers University have celebrated it.