Diameter Tank Tops

Tilia pollen grain, about 45 microns in diameter

An illustration for people who loves math, especially geometry teaches and students. This maths geek, nerd design has the formula to work on the circumference of a circle using pi.

Have you ever forgotten the first three digits of pi? Well fear not, with this design you have all.. um.. I don't even know how many decimal places this is but I think you'll be fine.

The badge is part of a collection named "Today is..." which contains a year full of unique designs for an every-single-day celebration of 2022. What’s a math teacher’s favorite dessert? Pie, of course! Pi. A concept that can be difficult to understand but is central to so many aspects of our lives. It goes on forever and ever and ever and ever and ever…. It truly is the number that goes on to infinity. Each year brings with it a certain day that shares numerical values with Pi, and on that day there is a celebration of Pi. And not only Pi, but also Pie! Because the two words sound the same, the math concept and the tasty dessert are joined together in delicious unity.

Pi is not rational

Circles, squares, perimeter, diameter, circumference. Is it keywords or Math? It’s both! And it looks cool.

The famous symbol Pi, colored in blue with some of its numbers in the background. A good option for gifting mathematicians.

circle pattern, abstraction

Pi, also known by the Greek letter “π,” is a constant value used in math that represents the ratio of a circumference of a circle to its diameter, which is just about 3.14….15…9265359… (and so on)

Gotta be optimistic. This design is slightly gritty, slightly dirty, slightly grungey, slightly distressed, slightly worn. Just like any math or physics major.

Drafting Compass

This Pi Day design features a circle with a humorous math-related pun. Celebrate the mathematical constant pi with this fun and unique design!

This design shows a mathematical equation to calculate the volume of a pizza. It is a fun way to learn math and understand the concept of volume.