pi and its design

Pi and its importance in design
It is defined as the ratio of a circle's circumference C to its diameter d is called pi.  It is denoted by symbol  π.

Π = C/d = Circumference/diameter = 3.14159

Examples 
                       Π = C/d = Circumference/diameter = 40075/12742 = 3.14159

Earth

pi designed cricket stadium

pi designed wall clock

pi designed foot path

pi designed tires

pi designed pyramid

pi designed pi chart

pi designed building