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Pi Day
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Pi Day
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Pi Day

observance
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The Information Architects of Encyclopaedia Britannica

The Information Architects maintain a master list of the topics included in the corpus of  Encyclopædia Britannica, and create and manage the relationships between them.

The Information Architects of Encyclopaedia Britannica

Learn about this topic in these articles:

  • Pi Day
    What Is Pi Day?

    Pi Day is a celebration of the never-ending mathematical constant pi (π), which relates the circumference C of a circle to its diameter d; that is, π = C/d.The numerical value of pi to five decimal places is 3.14159; hence, Pi Day is…

    Read More

    Pi Day is a celebration of the never-ending mathematical constant pi (π), which relates the circumference C of a circle to its diameter d; that is, π = C/d.The numerical value of pi to five decimal places is 3.14159; hence, Pi Day is…

    Read More