pi: References & Edit History
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Article History
| Type | Description | Contributor | Date |
|---|---|---|---|
| Invalidated site: Wolfram MathWorld - Pi. | Nov 10, 2026 | ||
| Article revised and updated. | Sep 03, 2026 | ||
| Added cross-references and edited caption. | Mar 02, 2026 | ||
| Article revised. | Nov 17, 2025 | ||
| Add new Web site: K12 LibreTexts - Use Diameter, Radius and Pi. | Jul 31, 2025 | ||
| Add new Web site: Digital Commons at Ursinus College - How to Calculate pi: Buffon's Needle (Calculus version) (PDF). | Jun 20, 2025 | ||
| Add new Web site: Academia - Theory of Ο (PDF). | Apr 25, 2025 | ||
| Questions and answers revised. | Mar 17, 2025 | ||
| Questions and answers added. | Mar 13, 2025 | ||
| Add new Web site: Gresham College - The Story of Pi. | Dec 20, 2024 | ||
| Add new Web site: Al Jazeera - What is Pi Day? The story of the circle. | Oct 21, 2024 | ||
| Add new Web site: Rutgers University - Department of Mathematics - The History of Pi. | Sep 09, 2024 | ||
| Changed β62,831,853,071,796β to β100 trillion.β | Mar 13, 2024 | ||
| Links added. | Dec 07, 2023 | ||
| Add new Web site: Texas A&M University - Department of Mathematics - Pi - A Brief History. | Sep 04, 2023 | ||
| Add new Web site: Story of Mathematics - Pi. | May 17, 2023 | ||
| Changed β31,415,926,535,897 decimal placesβ to β62,831,853,071,796 decimal places.β | Mar 14, 2022 | ||
| Corrected display issue. | Apr 29, 2021 | ||
| Changed "22/7" to "3.14 or 22/7." Changed "more than 13,300,000,000,000 decimal places" to "31,415,926,535,897 decimal places." Changed "its two-quadrillionth digit" to "its two-quadrillionth digit when expressed in binary (0)." | Mar 14, 2019 | ||
| Add new Web site: LiveScience - What is Pi? | Apr 26, 2018 | ||
| Add new Web site: Exploratorium - Pi. | Mar 14, 2018 | ||
| Add new Web site: Math is Fun - Pi. | Feb 27, 2018 | ||
| The words "its digits do not repeat" added. Pi expanded from 31 to 39 decimal places. |
|
Jun 01, 2015 | |
| Discussion about William Jones devising symbol for pi added. Number of digits calculated for pi updated from 2.7 trillion to 13.3 trillion. | Mar 10, 2015 | ||
| Description of how the Babylonians calculated pi expanded. | Apr 16, 2012 | ||
| Add new Web site: Paul's Page of Pi. | Oct 04, 2011 | ||
| Two-quadrillionth digit of pi calculated. | Sep 16, 2010 | ||
| Animation of Archimedes' method for calculating pi added. | Jan 27, 2010 | ||
| Updated number of calculated decimal places in pi from 200 billion to 2.7 trillion. | Jan 27, 2010 | ||
| Added new Web site: How Stuff Works - Science - How Pi Works. | Feb 11, 2009 | ||
| Media added. | Aug 25, 2008 | ||
| Added new Web site: ThinkQuest - Pi. | Jul 17, 2008 | ||
| Added new Web site: Ralph Greenberg - Pi and the Great Pyramid. | May 01, 2007 | ||
| Added new Web site: School of Mathematical and Computational Sciences University of St Andrews - A History of Pi. |
|
Nov 21, 2006 | |
| Added new Web site: Graphics for the Calculus Classroom. | Jun 08, 2006 | ||
| Added new Web site: Graphics for the Calculus Classroom. | Jun 08, 2006 | ||
| Added new Web site: Paul's Page of Pi. | May 11, 2006 | ||
| Article revised. | Jan 04, 2002 | ||
| Article revised. | Oct 25, 2000 | ||
| Article added to new online database. | Jul 20, 1998 |
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