Street Parking: Metered parking available on Charles St. $1.25 per hour; 2 hour maximum before having to move to a different meter. Valet parking: Available starting at 5 PM daily. Valet charge is $20. Garage Parking: Boston Common Parking Garage- Charles St./Beacon St. corner of garage.
By definition, pi is the ratio of the circumference of a circle to its diameter. Pi is always the same number, no matter which circle you use to compute it. For the sake of usefulness people often need to approximate pi.
Pi is a number expressing the ratio of the circumference of a perfect circle to its diameter. As there are no perfect circles or spheres in nature (since matter is composed of atoms and is therefore not smooth) the continued extension of pi has long been seen as a harmless exercise of computer power.