Saturday, Aug. 23, 2014

All things pi: How to celebrate one of the nerdiest holidays of the year (10 items)

By Deseret News

March 13, 2014

Although National Pie Day is Jan. 23, it should not be confused with National Pi Day on March 14. The Greek letter "π" is also the letter that represents the value of the ratio of the circumference of a circle to its diameter.

The number pi, which begins 3.14, is irrational and therefore without an end. The University of Utah posted pi to 10,000 digits, and other websites have expanded the number even further.

Physicist Larry Shaw at the Exploratorium in San Francisco established Pi Day in 1988 and in 2009 the United States House of Representatives passed a resolution that officially recognized the day. National Pi Day has gained popularity over the years with more celebrations and events planned.

If you can't get enough of pi — or the pie that usually comes with it — get your nerd on with some of these celebration suggestions.

Related: Looking for the perfect Pi Day pie? Here are 25 recipes to help you out

1 of 10. The City Library Pi Day celebration

From 3-5 p.m., all Salt Lake City public libraries will host an event celebrating Pi Day with pies and spirographs.

2 of 10. Celebrate with Zaniac

The after school program Zaniac is hosting a Pi Day celebration at 1045 E. 2100 South in Salt Lake City. The first 20 K-8 students to register will participate in technology and math-based activities. Visit the Facebook event page for more information.

3 of 10. Grab a slice from the Pi

The Pie Pizzeria is holding a special for its Facebook friends, which will be announced Friday morning.

4 of 10. Get some exercise

If you prefer to celebrate pi with pie, you can also celebrate by working off that pie by walking, hiking or biking 3.14 miles.

For hikers, the Donut Falls trail in Big Cottonwood Canyon is roughly 3.14 miles long.

5 of 10. 'Pi' up your waredrobe

Using a stencil, iron-on or paint, create pi-inspired shirts, jewelry and other crafts using the pi symbol π.
1. I know it. I Live it. I Love it.
Provo, UT,
March 14, 2014

"in 2009 the United States House of Representatives passed a resolution that officially recognized the day."

I can think of roughly 3.14 reasons why this does well to illustrate how poorly our tax dollars are being used.

2. On the other hand
Riverdale, MD,
March 14, 2014

Pi is an irrational number, which means you literally can't write out all the digits. But if you're going to approximate pi, the accepted method is to pick a degree of precision (say, three decimal points) and write the digits up to that point, rounding the last one if necessary. Thus, pi to three decimal points is 3.142; pi to five decimal points is 3.14159; and so on. Contrary to the illustration that accompanies item #7 in this list, 3.145 is not a particularly good approximation of pi.

3. Hutterite
American Fork, UT,
March 14, 2014

Let's start by acknowledging the importance of science, and knowledge in general.

4. SillyRabbit
Layton, 00,
March 14, 2014

Haha! Good catch. 3.145.

Question: How is pi considered a mathematical constant even though there is no final decimal number? For instance how c is a universal physical constant, but c ends in .0000etc, and pi never ends on the right of the decimal.

5. Brave Sir Robin
San Diego, CA,
March 14, 2014


In math, a constant does not have to be a rational number. A mathematical constant can be any number of special physical significance. In the case of pi, take the circumference of a circle and divide it by the diameter of that same circle and you get pi. What's cool is you get the same answer when you do the same thing to ANY circle of ANY size. That's why pi is a constant - because the value is the same no matter what circle you're trying this on.

Other irrational constants are Euler's number (e), Pythagoras' number (square root of 2), and the gravitational constant (G).