While most people would not enjoy sharing their birthday celebration with someone else, I am happy to split the attention with a very special number…Pi. Yes, my birthday falls on Pi Day (3/14). In observance of such a significant constant, here are some 3.14 facts:

 Most people would say that a circle has no corners, but it is more accurate to say that it has an infinite number of corners.
The sequences of digits in Pi have so far passed all known tests for randomness.
Here are the first 100 decimal places of Pi
3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679
The fraction (22 / 7) is a wellused number for Pi. It is accurate to 0.04025%.
Another fraction used as an approximation to Pi is (355 / 113) which is accurate to 0.00000849%
A more accurate fraction of Pi is (104348 / 33215). This is accurate to 0.00000001056%.
Pi occurs in hundreds of equations in many sciences including those describing the DNA double helix, a rainbow, ripples spreading from where a raindrop fell into water, general relativity, geometry problems, waves, etc.
There is no zero in the first 31 digits of Pi.
Pi is irrational. An irrational number is a number that cannot be expressed as a ratio of integers.
In 1991, the Chudnovsky brothers in New York, using their computer, m zero, calculated pi to two billion two hundred sixty million three hundred twenty one thousand three hundred sixty three digits (2, 260, 321, 363). They halted the program that summer.
The Pi memory champion is Hiroyoki Gotu, who memorized an amazing 42,000 digits.
The old memory champion was Hideaki Tomoyori, born Sep. 30, 1932. In Yokohama, Japan, Hideaki recited pi from memory to 40,000 places in 17 hrs. 21 min. including breaks totaling 4 hrs. 15min. on 910 of March in 1987 at the Tsukuba University Club House.
Pi is of course the ratio of a circle’s circumference to its diameter. If you bring everything up one dimension to get 3D value for Pi, the ratio of a sphere’s surface area to the area of the circle seen if you cut the sphere in half is exactly 4.
If you take 10 million random digits, statistically on average you would expect 200 cases where you get 5 digits in a row the same. If you take 10 million digits of Pi, you get exactly 200.
If a billion decimals of pi were printed in ordinary type, they would stretch from New York City, to the middle of Kansas.
The square root of 9.869604401 is approximately Pi. The square root of an irrational number is irrational too.
For a circle to equal pi the diameter must be 1.
 Most people would say that a circle has no corners, but it is more accurate to say that it has an infinite number of corners.
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