# Between Us Parents

## What is Pi Day? Facts about Pi, Pi Day and Pie

Today is March 14, which can be written numerically as 3/14. It also Pi Day. Pi is the Greek letter “π” and it is also the symbol used in mathematics to represent a constant — the ratio of the circumference of a circle to its diameter — which is approximately 3.14159.  It is usually shortened to 3.14, hence the celebration on this calendar date.

Facts about Pi, or π, from PiDay.org:

• an irrational and transcendental number, Pi will continue infinitely without repetition or pattern;
• Pi has been calculated to over one trillion digits beyond its decimal point;
• Pi is a recurring constant that has been studied throughout history and is central in mathematics as well as science and engineering;
• Pi is often introduced in middle school or junior high math classes.

• On March 12, 2009, the United States Congress passed a resolution recognizing Pi Day. You can find the text of the House Resolution here;
• Memorization contests are popular - see which family member can memorize the most digits of Pi
• Pi Day has inspired not only mathematicians, but also musicians. You can watch “The day they discovered Pi…” by Ken Ferrier and Antoni Chan via YouTube, or find Pi Day music, including raps and carols, here, or check out Pi Diddy's hit single “Loving Pi” ;
• Find more ideas for how to celebrate Pi Day here and here;
• March 14 is also Albert Einstein's birthday. He was born in 1879. My favorite Einstein quote: "Imagination is more important than knowledge. For knowledge is limited, whereas imagination embraces the entire world, stimulating progress, giving birth to evolution."

Pie and photo by Amanda Hoffman

• here are some tasty pie recipes for Pi Day from NPR’s Doreen McCallister, or use these recipes from the South Side PieChallenge cookbook;
• You can calculate the circumference of a pie with this formula 2πr (r = radius), and area of a pie with the formula π r squared;
• The most popular flavors of purchased pie: Apple, pumpkin, cherry, blueberry, and Dutch apple;
• Pie is both fun to eat, and fun to read about, especially in Sarah Week's book Pie.
• The first pies were filled with meat and called "coffins" which means "basket" or "box." Find facts on the history of pie here.

I'm sure you like pie, but please also like Tween Us on Facebook.

If you would like to get emails of Tween Us posts, please type your email address in the box and click the "create subscription" button. My list is completely spam free, and you can opt out at any time.

Filed under: Education, Food &amp; Nutrition, Holiday

Tags: Pi, pie

• Welcome to ChicagoNow.

• ### Meet The Blogger

#### Shannan Younger

Mom of a tween, working hard to understand how best to parent this tricky and fabulous age group. You can email at TweenUsBlog [at] gmail [dot] com.

• ## Chicago Parent

• ### Recent posts

• #### 10 fun facts about "A Charlie Brown Christmas" on its 50th anniversary »

Shannan Younger on Between Us Parents
Posted Monday at 11:17 am
• #### Jim Valvano was absolutely right about the 3 things you should do every day »

Shannan Younger on Between Us Parents
Posted November 18, 2015 at 10:02 pm
• #### 9 great subscription boxes for teens and tweens, 2015 edition »

Shannan Younger on Between Us Parents
Posted November 16, 2015 at 11:59 pm
• #### Happy World Kindness Day! What it is, and how you and your kids can get involved »

Shannan Younger on Between Us Parents
Posted November 13, 2015 at 9:10 am
• #### Fantastic video on consent that all teens and their parents should watch »

Shannan Younger on Between Us Parents
Posted November 10, 2015 at 2:49 pm
• ## Find me on bloglovin’

• ### Latest on ChicagoNow

• #### Give Thanks This Thanksgiving and Mean It!

from The Bright Side of Chicago by Nancy Simon
posted today at 4:48 pm
• #### A Few Helpful Tips When Organizing Seniors

from Organizing With Erin by erintheorganizer
posted today at 4:19 pm
• #### A Broken Offense Wasn't What We Expected

from Chicago Bulls Confidential by Mark Karantzoulis
posted today at 4:08 pm
• #### Barcelona is ridiculous

from Soccer Obsessive by Dan Santaromita
posted today at 4:07 pm
• #### On Gratitude for the Commonplace

from Neighborland by Liz Chilsen
posted today at 4:02 pm