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Wednesday, 15 February 2017

Pi

Pi is a mathematical constant, the ratio of a circle's circumference to its diameter, which is commonly approximated as 3.14159.

The circumference of a circle is slightly more than three times as long as its diameter.
HISTORY

Until 1706 the ratio of a circle's perimeter to its diameter was known as “the quantity which, when the diameter is multiplied by it, yields the circumference." The Greek letter pi was introduced as a simpler definition by the Welsh mathematician William Jones (1675- July 3, 1749) in his 1706 work Synopsis Palmariorum Matheseos; or, a New Introduction to the Mathematics. He chose π the Greek for p as it was the first letter of “periphery” or “perimeter” which were the words then used for circumference.

William Jones by William Hogarth

A bill before the State Legislature of Indiana in 1897 tried to set the value of pi at 3.2. It was approved by the House, but not the Senate.

The publisher and writer John Taylor first proposed the idea that Egypt's Great Pyramid at Giza, built around 2589 to 2566 B.C., was designed based on pi. Taylor found that the vertical height of the pyramid has the same relationship to the perimeter of its base as the radius of a circle has to its circumference. Other people have since made the link between the Great Pyramid and pi as well, although it may not have been intentional

DIGITS

Pi is an irrational number: its decimal value goes on for ever, never stopping or repeating.

The value of pi was calculated to 22,459,157,718,361 decimal places on November 11, 2016. It took 105 days to compute the 22.5 trillion digits.

A pi pie. 

In an episode of Star Trek: The Original Series, Spock commands an evil super computer to compute pi to the last digit (which, you no doubt realize is highly illogical …).

The first 144 digits of pi add up to 666 (which many scholars say is “the mark of the Beast”). And 144 = (6+6) x (6+6).

If you list the first 360 digits of PI, the last 3 digits will be "360". PI comes from a circle which has 360 degrees.

You have to go to the 606th and 607th digits in the decimal expansion of pi (3.14159265…) before you see the number 68. Every other two-digit number occurs earlier in the value of pi.

The world record for memorizing the value of pi was set by Rajveer Meena at the VIT University, Vellore, India, on March 21, 2015. Rajveer, a resident of Mohocha village in Swaimodhapur district of Rajasthan, correctly recited from memory its first 70,000 digits. He wore a blindfold throughout the entire recall, which took him 9 hours 27 minutes.


FUN PI FACTS

Pi Day is celebrated around the world on March 14 or 3.14 and officially kicks off at 1:59 pm. When combined the date and time results in 3.14159, the approximate numerical value of pi.

A mosaic outside the Mathematics Building at the Technical University of Berlin. By Holger Motzkau - 

March 14 may be Pi Day but the ultimate Pi Day was March 14, 1592, or 3.14.1592 as the Americans write it, which has the first seven digits of pi.

If you write "3.14" on a piece of paper and hold it up to a mirror, it looks like the word "PIE".

Source Daily Express

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