The 2018 Pi Day is observed on which date?
[B] March 14
[C] March 15
[D] March 12
The Pi Day is observed every year on March 14 (3/14) across the world. It is an annual celebration of the mathematical constant π (pi). Pi represents the ratio of a circle’s circumference to its diameter. It’s an important part of the foundation of mathematics, most importantly geometry, where pi is key to equations calculating the area of a circle, A = πr2, and the volume of a cylinder, V = πr2h.