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  2. Pi - Wikipedia

    en.wikipedia.org/wiki/Pi

    Pi Day in 2015 was particularly significant because the date and time 3/14/15 9:26:53 reflected many more digits of pi. In parts of the world where dates are commonly noted in day/month/year format, 22 July represents "Pi Approximation Day", as 22/7 = 3.142857.

  3. Pi Day - Wikipedia

    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 (the 3rd month) since 3, 1, and 4 are the first three significant figures of π, and it was first celebrated in the United States. [2] [3] It was founded in 1988 by Larry Shaw, an employee of a science museum in San Francisco, the Exploratorium.

  4. Approximations of π - Wikipedia

    en.wikipedia.org/wiki/Approximations_of_π

    The software may be obtained from the Pi-Hacks Yahoo! forum, or from Stu's Pi page. Super PI by Kanada Laboratory in the University of Tokyo is the program for Microsoft Windows for runs from 16,000 to 33,550,000 digits. It can compute one million digits in 40 minutes, two million digits in 90 minutes and four million digits in 220 minutes on a ...

  5. Google's Pi Day Map Reveals the Most Popular Pies in ... - AOL

    www.aol.com/googles-pi-day-map-reveals-173400151...

    Did you know that there's a day dedicated to pie? Or should we say Pi! March 14th marks the annual Pi Day, a day dedicated to honoring the mathematical constant pi or π (aka 3.14).The day is also ...

  6. Chronology of computation of π - Wikipedia

    en.wikipedia.org/wiki/Chronology_of_computation...

    As of July 2024, π has been calculated to 202 trillion decimal digits. The last 100 decimal digits of the latest world record computation are: [1] Graph showing how the record precision of numerical approximations to pi measured in decimal places (depicted on a logarithmic scale), evolved in human history.

  7. Proof that π is irrational - Wikipedia

    en.wikipedia.org/wiki/Proof_that_π_is_irrational

    v. t. e. In the 1760s, Johann Heinrich Lambert was the first to prove that the number π is irrational, meaning it cannot be expressed as a fraction , where and are both integers. In the 19th century, Charles Hermite found a proof that requires no prerequisite knowledge beyond basic calculus.

  8. (3.)14 Ways to Celebrate Pi Day (Besides Eating a Big Slice ...

    www.aol.com/3-14-ways-celebrate-pi-130058864.html

    The post (3.)14 Ways to Celebrate Pi Day (Besides Eating a Big Slice of Pie!) appeared first on Reader's Digest. How did Pi Day get started? Every March 13th we gather our loved ones to celebrate ...

  9. Area of a circle - Wikipedia

    en.wikipedia.org/wiki/Area_of_a_circle

    The area of a regular polygon is half its perimeter multiplied by the distance from its center to its sides, and because the sequence tends to a circle, the corresponding formula–that the area is half the circumference times the radius–namely, A = ⁠ 1 2 ⁠ × 2πr × r, holds for a circle.