Pi is the ratio of a circle's circumference to its diameter. Pi (π) is also the ratio of a circle’s area to the square of its radius.

Pi is an irrational number that can’t be expressed as a fraction of the form m/n where m and n are both integer numbers. Pi is an example of what’s called a transcendental number.

March 14 Pi Day. 3/14, get it? It also happens to be Albert Einstein’s birthday. Imagine that.

I love pi[e] more than cake, keep a freezer full of fresh-picked fruit ready to go, and have never been able to make pie crust from scratch like my father. Several childhood chums, including Ros Chrenka & Don Kelley have challenged me to do a Pi crust.

Photos of pi anone?

By far the best place to learn about pi is to read David Blatner's The Joy of Pi book. Not that his Joy of Pi website ain’t grand in and of itself.

You too can compute pi. Join Background Pi, a distributed computing project. Use your computer’s spare cycles to compute pi.

Remember kids, pi is a good source of randomness. That’s why it’s used in the Blowfish encryption algorithm because it’s a “Nothing up my sleeve number”.

Want some pi? *3.1415926535897932384626433832795028841971693993751058209749445923 0781640628620899862803482534211706798* And if that isn’t enough here are a million digits of pi. Memorizing long strings of pi is called *piphilology*. Some use poems called piems to aid in memorization.

Pi trivia: the number 1 occurs 10,137 times within the first 100,000 digits of pi while the number 9 appears only 9,902 times.