Circumference Baseball T-Shirts

Description: Medieval geometry for math nerds to history teachers (and everyone in between!)

Description: A black background displays white text listing mathematical formulas and their descriptions. It starts with the Pythagorean Theorem (a² + b² = c²), followed by the Area of a Circle (Area = πr²), and the Circumference of a Circle (C = 2πr). It concludes with 'AND FINALLY... THE BIG ONE' and the equation for a line (y = mx + b) described as '(A FREAKIN' LINE)'.

Description: A decorated Christmas tree is divided into geometric shapes and surrounded by area, volume, and circumference formulas beneath the pun Oh Geometree. This playful classroom humor is ideal for a math teacher, STEM educator, or mathematics student. It also makes a clever secret Santa gift or teacher appreciation present for the holiday season.

Description: Pi Approximation Day! Twenty Second of July, Pi Approximation Day, 22 divided by 7 equals approximately 3.14. Fascinating smart people for a long time. Good choice for anybody with interest in mathematics, sciences, engineering, history, etc. Black version.

Description: Too Much Pi Can Give Large Circumference Funny Pi Day Math

Description: A skull wearing a chef's hat, with crossed bones behind it, inside a circular border. The text 'KNUCKLE SANDWICH' curves along the bottom. The design uses a distressed, vintage style in white and black only.

Description: Another Pi Day! Twenty Second of July, Pi Approximation Day, 22 divided by 7 equals approximately 3.14. Fascinating smart people for a long time. Good choice for anybody with interest in mathematics, sciences, engineering, history, etc. Colorful version.

Description: Funny Come to the Math Side we have PI

Description: Another Pi Approximation Day design. Another Pi Day! Twenty Second of July, Pi Approximation Day, 22 divided by 7 equals approximately 3.14. Fascinating smart people for a long time. Good choice for anybody with interest in mathematics, sciences, engineering, history, etc.

Description: Pi sign drawing. Fascinating smart people for a long time. Good choice for anybody with interest in mathematics, sciences, engineering, history, etc.

Description: Smiling Cow Pi

Description: Pi symbol and spiral numbers. Good choice for geeks and anybody with interest in mathematics, sciences, engineering, history, etc. Fascinating smart people for a long time. Celebrate Pi Day, March, 14!

Description: Tau Day mathematical constant t-shirt design.

Description: Buzz into math fun with our adorable bee teaching maths! Celebrate Pi Day with a playful twist as our busy bee helps you explore the wonders of circles, pi numbers, and more in this delightful design.

Description: This design if all typography including the symbol for pi.

Description: Bold Y2K style Human being design. The numbers are the circumference of earth symbolising all of us. We are all human beings.