Circumference of a Circle

In this instructable, you will learn how to find the circumference of a circle. It is a very simple process, but requires a scientific calculator or better, if you want to find the exact answer. You can also use your regular cheap calculator from walmart but you will be off on your answer a little bit. please pardon the spelling error, it should be circle, not cirle.

Step 1 Find a circle with the dimensions

The first step is to find a circle. It helps if the circle has already written dimensions, but you only need the diameter, so it won't be that hard to find. This circle has dimentions already written on it.

Comments

[HamO]

Why do you (they) use Pi. And why multiply Pi times diameter?

[chibiwind]

because pi is the rule for calculating circumference they figured out a pattern that worked for every circle.

[iloveairsoftstuff]

i don't know why they do it, or how it works, my math teacher said that is how it is so that is how it is and it gets the correct answer