# Celebrate Pi Day -- March 14

## On Pi Day, math nerds everywhere celebrate the beauty of Pi's infinite progression of numbers.

What is Pi? Pi (π) is approximately 3.14159, the mysterious mathematical constant which represents the ratio of any circle's circumference to its diameter. I say "approximately" because Pi itself is what is termed an "irrational number". That means it never repeats or ends. It keeps going and going forever.

Pi Day is celebrated on March 14 (3/14) each year in honour of Pi. It was first founded in 1988 at the Exploratorium in San Francisco by physicist Larry Shaw, and in 2009 the US House of Representatives designated March 13 as "National Pi Day". Schools around the nation take the occasion of the holiday to explore the significance of this number. It is currently treated as a day of mathematics, fun, and an excuse to have more pie.

### How many digits of Pi do you know?

To 550+ digits:

3.141592653589793238462643383279502884197169399375105820974944592307816406286208

9986280348253421170679821480865132823066470938446095505822317253594081284811174

5028410270193852110555964462294895493038196442881097566593344612847564823378678

3165271201909145648566923460348610454326648213393607260249141273724587006606315

5881748815209209628292540917153643678925903600113305305488204665213841469519415

1160943305727036575959195309218611738193261179310511854807446237996274956735188

5752724891227938183011949129833673362440656643086021394946395224737190702179860

To one million digits and still going strong  ...

### Which is better, Pi or e?

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### Pssst! Your math geek is showing.

The numeric HTML reference for Pi is &#928; (displays as "π").

 Celebrate Pi DayTealmermaid Designs

### Say it in maths

Area of a circle = πr2
Circumference of a circle = 2πr

### Five foods to eat while celebrating Pi Day

Round foods are of course best for this purpose, taking the time to calculate both the area and circumference of the circular food in question.

• Pie (any type of pie will do)
• Pizza pies
• Cookies and cakes with a "pi" symbol on the top in icing
• Coffee, pie, and doughnuts (a mnemonic for C = pi*d is Coffee Pie Donuts)
• Any other round food will work in a pinch. M&Ms, Skittles, round cereals ...

### An expression of Pi love

 A History of PiThe true story of Pi's backstory, such as it is.View on Amazon Men's Pi Day T Shirt - Everyday should be Pi Day XL BlackCelebrate Pi Day in style with this artsy black T-shirt.View on Amazon Pi Pie PanWhat could be a more appropriate food for Pi Day than a pie baked in a Pi shaped pan? The volume is equivalent to that of a standard 9" pie pan. What kind of pie do you like?View on Amazon Blue Silicone Ice Cube Tray Pi Symbol for Ice Jello even ChocolateKeep your drink chilled to Pi conditions by adding these Pi shaped ice cubes.View on Amazon NUOP PI Pizza Cutter in RedIt's Pi Day, so use this nifty Pi shaped cutter to have yourself a slice of pizza pie in celebration.View on Amazon

### About Pi and Pi Day

• Teach Pi: a nexus for Pi Day activities.
• PiQuery search: A linear search engine designed to find the searcher's particular chosen string of digits within Pi. I imagine any given string of numbers would produce some sort of search result.

### Do you plan to celebrate Pi Day this year?

Updated: 06/16/2017, tealmermaid
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