Happy Pi Day
Wishing all the Den Members a very Happy PI Day…
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Celebrate Pi Day
Pi, Greek letter ( 
), is the symbol for the ratio of the circumference of a circle to its diameter. Pi = 3.1415926535… Pi Day is celebrated by math enthusiasts around the world on March 14th.
Discussions
Talk About Pi
- What is your favorite Pi Day activity?
- How many digits of Pi have you memorized?
- Find out what people are saying, and join in the conversation!
Learn About Pi
With the use of computers, Pi has been calculated to over 1 trillion digits past the decimal. Pi is an irrational number meaning it will continue infinitely without repeating. The symbol for pi was first used in 1737 by William Jones, but was popular after it was adopted by the Swiss mathematician Leonhard Euler in 1737. Learn More »
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Send your friends Pi Day eCards to wish them a Happy Pi Day!
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The Pi Day Shop is open year-round, so plan ahead for Pi Day!
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