       # What is number pi ( ) and how is it related to area of a circle?

Pi ( ) is a constant used to calculate area of a circle. Pi ( ) is an irrational number. In other words, pi ( ) is ratio of two numbers and a non terminating, non repeating decimal number. Its value is 3.14 (rounded to two decimal places).

Pi is a Greek letter and use to represent the constant (fixed number) used in the formula for area of a circle.

There is a long research to find the exact value of pi and numerous mathematicians have worked to find its exact value

If anybody wants to learn about the circumference or area of a circle, he have to know about “pi ( )” as it is used in circle geometry to calculate its circumference and area.

## The definition of pi ( )

Pi is defined as the ratio of circle’s circumference to its diameter.

In other words, if there is a circle and we can easily measure its circumference and the diameter, divide these numbers to get pi ( ).

### Numerical value of pi ( )

The value of pi remains constant because the ratio of circumference of a circle to its diameter is always fixed, independent of the size of a circle. The numerical value of pi is equal to 3.14, rounded to two decimal places. You can learn more about pi in depth at this encyclopedia page.

 How to measure pi ( ) As said earlier pi is the ratio of circumference to the diameter of a circle, below is an easy explanation to find the value of pi using a given circle. Remember, you can use pi to find the circumference and the area of the circle, algebraically. Hence the brief introduction with Pi, a constant used to find the area of a circle. The next step is to explore lessons and worksheets on circle geometry, how to find the circumference and area of a circle and its applications in geometry.