Today is: Pi Approximation Day
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Pi Approximation Day celebrates the pi symbol (π) and its importance to mathematics. The symbol is a Greek letter, and it is used in mathematics to represent the ratio of the circumference of a circle to its diameter. The first digits of this ratio are 3.14159, and the number continues infinitely without a pattern, being an irrational number. It has been calculated to more than 1 trillion digits after the decimal point. The symbol "π" was first used in 1706 by William Jones. It gained in popularity after being used by Swiss mathematician Leonhard Euler in 1737.
Pi can be expressed as the fraction 22/7, which is an approximation of its actual value (hence the word "approximation" in the day's title).
Source: Checkiday.com
This article originally appeared on Fremont News-Messenger: Today is: Pi Approximation Day
