Pi Circumference Diameter Tee

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Get some Pi fun in with this Pi Day tee. With the math formula in its most basic form, the Pi Circumference Diameter Tee is great for math nerds, math geeks, and math enthusiasts of all ages. Wear a symbolic shirt for Pi Day on 3.14. It seems appropriate to have a bit of math-inspired fun with this mathematical and historic reason for celebration!

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