1. We can never truly know the vaue of pi. So, we can never truly measure the cicumference or the area of a circle.
2. The first 144 digits of pi add up to 666.
3. The first six digits of pi (314159) appear in order at least six times among the first 10 million decimal places of pi.
4. Pi has 6.4 billion known digits that would take 133 years to recite without stopping.
5. Albert Einstein was born on Pi day (3/14/1879) in Ulm Wurttemberg, Germany.
6. Pi is transcendental and irrational. It is irrational because it can't be written as a rational simple fraction, it is transcendental because it is not algebraic.
7. Japanese memory master Akira Haraguchi has recited 100,000 digits of pi in public (it took more than 16 hours), and told The Guardian that his personal record goes to 111,700 digits. Haraguchi's technique relies on assigning symbols to numbers, turning pi's random sequence of digits into stories — mostly, he says, about animals and plants.
8. Even computers can't find the value of Pi exactly.
9. If you see Pi (3.14) in a mirror, it looks like the word PIE. https://twitter.com/GoogleUK/status/709284300659752960
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