Happy Pi Day! Fellow "Lost" fans please note: for today only, Pi is my constant!

Happy Pi Day! Fellow "Lost" fans please note: for today only, Pi is my constant!

Completely Irrational, if you love Math or Pi Day, this shirts for you. Check out all our Math shirts!

Completely Irrational

Completely Irrational, if you love Math or Pi Day, this shirts for you. Check out all our Math shirts!

This shirt is adorable for March 14! Click to find more great Pi Day activities for you and your children.

This shirt is adorable for March 14! Click to find more great Pi Day activities for you and your children.

Pi Day Shirt come to the dark side we have Pi by Destined4Destin on Etsy

Pi Day Shirt come to the dark side we have Pi by Destined4Destin on Etsy

For Moser and Nolt.  Pirates Pi Day T-shirt - justintrails.com

Pirates T-shirt

Math geeks will be delighted with this pi day of the century (3.14) graphic! March 14, 2015 at 9:26:53 AM/PM (or rather, 3.14.15 9:26:53) is something to celebrate in the mathematics world, a once in a lifetime event.

Pi Day of the Century

Math geeks will be delighted with this pi day of the century (3.14) graphic! March 14, 2015 at 9:26:53 AM/PM (or rather, 3.14.15 9:26:53) is something to celebrate in the mathematics world, a once in a lifetime event.

InsPIre | 17 Impossibly Awesome Tees To Celebrate National Pi Day

17 Impossibly Awesome Tees To Celebrate National Pi Day

InsPIre | 17 Impossibly Awesome Tees To Celebrate National Pi Day

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