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Rating: 5 **Enjoy the “Pi Symphony” on Pi Day!, 3/14/11**

By: Talking Science

Video with Pi Day symphony. "Today, March 14th, is Pi day. The date 3/14 is the first three digits of the mathematical constant Pi (3.14159265358979…) which represents the relationship between a circle's diameter and its circumference. Pi is an irrational number, which means the sequence of digits will go on infinitely without repeating.
In honor of this auspicious day, enjoy this video in which composer Lars Erickson, talks about his orchestral piece “Pi Symphony."

Rating: 5 **Schools, math fans celebrate Pi Day -- Celebrate with pi, not cake, 3/14/11**

By: Liam Ford

Article in the Chicago Tribune. "Monday is Pi Day — a day to celebrate a number with desserts, numerical recitations and hot-dog throwing.
Pi, the number that expresses the ratio of a circle's circumference to its diameter, was first calculated in ancient times. Though it's a number with no endpoint, its digits start with 3.14159. Thus, March 14, or 3/14, for Pi Day.
The first Pi Day was celebrated in 1989 at the San Francisco Exploratorium."

Rating: 3 **Happy Half Tau Day!, 3/14/11**

By: Michael Hartl

Website to promote march 14th as half tau day. Exercerpt: "March 14, or 3/14, is known as “Pi Day” because of its resemblance to the first three digits in the decimal expansion of π (pi), which is defined as the ratio of a circle’s circumference to its diameter. The true circle constant is the ratio of a circle’s circumference to its radius, not to its diameter. This number, called τ (tau), is equal to 2π, so π is 12τ—and March 14 is thus Half Tau Day. (Of course, June 28, or 6/28, is Tau Day itself.) Although it is of great historical importance, the mathematical significance of π is simply that it is one-half τ."

Rating: 5 **What Pi sounds like, 3/12/11**

By: MichaelJohnBlake

YouTube video : Musician interprets Pi to 31 decimal places.

Rating: 5 **Holy Kaw! All the topics that interest us Musings on pi and some great recipes, 3/10/11**

By: Holy Kaw

Holy Kaw Musings . "Sure, we Americans talk a good game about upping the math and science scores of our youth but we all know the real way to win over our hearts and minds is through a good holiday and a sweet dessert.
That seems to be the thinking of Doreen McCallister at NPR as well as she muses over her own math failings, the growing popularity of Pi Day and celebrating this hot new math holiday (what the old ones were, who knows) in her own special way: Making pie and showing others how to do the same. Chances are you’ll get more out of it than an entire year of geometry."