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en.wikipedia.org/wiki/Pi

The number π is a mathematical constant, the ratio of a circle's circumference to its diameter, ..... Integers: 3; Fractions: Approximate fractions include (in order of increasing accuracy) ..... Series that converge even faster include Machin's series and Chudnovsky's series, the latter producing 14 correct decimal digits per term.

en.wikipedia.org/wiki/Pi_Day

Pi Day is an annual celebration of the mathematical constant π (pi). Pi Day is observed on March 14 since 3, 1, and 4 are the first three significant digits of π.

www.piday.org

Pi Day is celebrated on March 14th (3/14) around the world. Pi (Greek letter “π”) is the symbol used in mathematics to represent a constant — the ratio of the ...

www.cbsnews.com/news/pi-day-nerds-celebrate-314-march-14

Mar 14, 2017 ... Calling all math lovers: it's Pi Day, celebrated on March 14, or 3/14, every year. Symbolized by the Greek letter “π,” Pi is the symbol used in ...

www.mathsisfun.com/numbers/pi.html

Then the circumference (all the way around the circle) is Pi. pi circle ... So Pi (the symbol is the Greek letter π) is: ... Pi Day is celebrated on March 14. March is ...

www.al.com/news/index.ssf/2017/03/pi_day_2017_freebies_facts_and.html

Mar 14, 2017 ... March 14 - or 3/14 - is Pi Day in honor of the Greek letter that represents the symbol used in mathematics to represent the ratio of the ...

www.bustle.com/articles/147627-what-is-pi-day-7-facts-about-march-14-you-need-to-know

Mar 14, 2016 ... Have you noticed a lot of puns and pies being served up today, often in ... The calendar day 3/14 just so happens to include the first three ...

www.theverge.com/2016/3/14/11218914/pi-facts-pi-day-i-did-it-pi-way

Mar 14, 2016 ... You know the old saying: it's Pi Day, Pi Day, gotta get down on Pi Day. And what better way to ... Google UK (@GoogleUK) March 14, 2016 ...

www.nbcnews.com/business/consumer/got-3-14-celebrate-pi-day-deals-pizzas-pies-chicken-n733271

Mar 14, 2017 ... "March 14 also happens to be Albert Einstein's Birthday (go figure), ... Pi symbol and deals on food — especially pies or pizza pies with some ...

www.usatoday.com/story/tech/talkingtech/2017/03/13/everything-you-need-know-pi-day/99119560

Mar 13, 2017 ... March 14 is a time to pay tribute to mathematics. Also, pie.