Pronunciation: /paɪ/ Explain
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Is there any case where the ratio of the circumference of a circle to its diameter is not pi?
|Manipulative 1 - Definition of π (pi) Created with GeoGebra.||
Pi (π) is a
constant. It is defined to be the ratio of the circumference of a
to the diameter. The symbol for pi is the Greek letter
π. The value of pi is approximately 3.14159.
Pi is an
This means that the digits in the number go on forever without repeating.
This also means that no one can know the exact value of pi. In the
past, some mathematicians have used the fraction
22 / 7 to
pi. This approximation is accurate to 3 decimal places.
- McAdams, David E.. All Math Words Dictionary, pi. 2nd Classroom edition 20150108-4799968. pg 138. Life is a Story Problem LLC. January 8, 2015. Buy the book
Cite this article as:
McAdams, David E. Pi. 4/27/2019. All Math Words Encyclopedia. Life is a Story Problem LLC. http://www.allmathwords.org/en/p/pi.html.
4/27/2019: Changed equations and expressions to new format. (McAdams, David E.)
12/21/2018: Reviewed and corrected IPA pronunication. (McAdams, David E.)
12/1/2018: Removed broken links, updated license, implemented new markup, updated geogebra app. (McAdams, David E.)
11/2/2008: Change manipulatives to GeoGebra. (McAdams, David E.)
2/26/2008: Added hot link for. (McAdams, David E.)
7/12/2007: Initial version. (McAdams, David E.)