Pi Day mashes up math and munchies

Pi Day pie
Pi Day is a big pie day as well. (Pie via Twitter / @sweetnsavorypie)

Pi Day plays off the fact that March 14 – 3/14 – is a numerical pun on math’s best-known irrational number: pi, or 3.14. But there’s nothing irrational about punning pi, the ratio of a circle’s circumference to its diameter, with pastry as well.

The day has come to be known as a celebration of pie as well as pi (and, coincidentally, Albert Einstein’s birthday). In Seattle, pie tends to trump pi.

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By Alan Boyle

Mastermind of Cosmic Log, contributing editor at GeekWire, author of "The Case for Pluto: How a Little Planet Made a Big Difference," president of the Council for the Advancement of Science Writing. Check out "About Alan Boyle" for more fun facts.

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