The number represented by pi (π) is used in calculations whenever something round (or nearly so) is involved, such as for circles, spheres, cylinders, cones and ellipses. Its value is necessary to ...

March 14, 15:09:02. This date and time correspond to the first six decimal places of pi (π), the infinitely long number that begins ‘3.141592…’. It was created to commemorate ‘Pi Day (π-day)’. Pi ...