Pi Symbol Baseball T-Shirts

I Just Keeps Pi Going And Going Costume Gift

Lets Get Irrational, its Pi day!

I Ate Some Pie and it was DELICIOUS Eight Sum Pi day Math Mens Womens geek T-shirt Birthday gift idea tshirt Made in USA

Archimedes only cares about his circles, my dude.

Funny T-Shirt for Math Lovers | keep it real

Love To InsPire Forever Costume Gift

The mathematically savvy among us will know that the square root of -1 is I (for imaginary), that 2 cubed is 8, and the Greek letter sigma means "Sum Up". The rest of us will remain blissfully in the dark.