Anonymous

Pi. It is not a number, it is a ratio of a circle's circumference to its radius. It is an irrational number whose first digits are usually quoted as 3.14159.

Anonymous

It is pronounced as pi and its value is when the circumference of a circle is divided by its diameter which is about 3.14 to two decimal places.

Anonymous

In a circle if C is the circumference and d is the dimeter , then :- C = π d π = C / d

Anonymous

The ratio of the circumference of a circle to its diameter.