Circumference Of A Circle

In this instructable we will have some with the almighty and omnipresent pi! In effect we will explore the use of pi in finding the circumference of a circle.

Step 1 The Equation

To find the circumference we can either use the diameter or the radius of the circle, (see picture) the radius being half the length of the diameter.
Using equation
C=d X �

Or substituting the diameter for the radius
C= 2� X r or C= � X 2r

Comments

[D5quar3]

This is my formula C= pi x d or C=2 x pi x r you don't really need all those fancy letters that no one can understand. 

[stranoster]

Looks fine, except for the spelling mistake in the title. (Circle). Other than that, explains the basics and more difficult concepts well.

[duck-lemon]

Thank you and fixed. =]

[tfaulk26]

What's next? Are going to see postings about multiplication table? I thought this site is for more sophisticated stuff...

[Kiteman]

Try reading this.