Pi Approximation Day Tank Tops

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: 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: 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: a famous approximation of pi between 2 values, which dates back to archimedes, one of the beautiful and close results