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Find the Circumference of a Circle

circumference of a circle

Simple instructions to find the circumference of a circle with an explanation of Pi to find the circumference.

Circumference of a Circle Formula

These instructions are written in a simple format to quickly explain how to find the circumference of a circle and briefly explains Pi with formulas and example shown.

Instructions

The outer part of a circle is described as its circumference like the example shows. That's the distance around the entire circle. If you divide the circumference by the diameter, you get a value called Pi.

Pi is pronounced the same as the PIE picture of a PIE you eat you eat. The symbol used to represent Pi doesn't look as tasty. It appears like this Pi symbol symbol. It's basically a simple way of representing the number 3.14159265...., but easier to just remember and use 3.14 from now on. Pi is a constant number.



To find the circumference of a circle you multiply the diameter by Pi. The formula looks like this:

Circumference of a Circle Formula

For example, if d=3 feet, then you multiply 3 feet by 3.14. In this case the circumference would be 9.42 feet/ft.


See also: Find diameter and circumference of a circle | Formula for finding the area of a rectangle | What is a circle? | What is the radius of a circle? | What is the diameter of a circle? | What is the circumference of a circle?