# Pi Formulas

If you divide any circle’s circumference by its diameter, you’ll get the value of pi.

 Π = circumference/ diameter = 3.14159………

It cannot be written as an exact decimal as it has digits which goes on forever.

This way we can get the value of pi.

You can also use Π the other way round to find the circumference of the circle.

Circumference = Π X Diameter

Diameter = circumference / Π

### How to calculate the Pi (π)

Π is a very useful symbol and has many uses. Let’s see how to use it with examples.

## Examples of pi formula

Example: Tom measured 94 cm around the outside of a cylindrical vase, what would be the diameter of the same?

Solution:

Diameter = circumference / Π

= 94cm / Π

= 29.92… cm

= 30 cm approx.

To know more uses, applications, and formulas of different mathematical topics, visit BYJU’S.

#### Practise This Question

A system undergoes a process in which system releases 200 J heat and work done by the surroundings is 300 J. Change in internal energy of the system is