March 14th is Pi Day … celebrated by math enthusiasts around the world.

*Pi = 3.1415926535…*

Pi, Greek letter (), is the symbol for the ratio of the circumference of a circle to its diameter.

With the use of computers, Pi has been calculated to over 1 trillion digits past the decimal. Pi is an irrational and transcendental number meaning it will continue infinitely without repeating. The symbol for pi was first used in 1706 by William Jones, but was popular after it was adopted by the Swiss mathematician Leonhard Euler in 1737. Learn more about Pi.

To celebrate Pi Day, my munchkins and I will bake a razzleberry pie … discover the ratio of the circumference of a circle to its diameter by drawing circles in the driveway … make pine needle baskets this afternoon (they are round) … and read, *Sir Cumference and the Dragon of Pi* by Cindy Neuschwander.

[Admin Note :: I’ll post pictures later this afternoon]

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