Pi Day 2024 Images. Pi (greek letter “ π ”) is the symbol used in mathematics to represent a constant — the ratio of the circumference of a circle to its diameter — which is approximately 3.14159. Get a deal whether you prefer apple, cherry or pizza pie.
Math enthusiasts and bakers celebrate pi day on march 14 or 3/14, the first three digits of a mathematical constant with many practical uses. For the first time, get 1 free month of istock exclusive photos, illustrations, and more.
