Question

How do you find the circumference of a cirlcle?

Answer 1

2rPi:

Explanation:

You can multiply the radius by 2, which gives you the diameter. Then you multiply by Pi, which is 3.14 OR 22/7. If you are in Khan Academy, don't use 22/7.

Answer 2

There are 2 formula to find the circumference of a circle.


`\huge{\boxed{\bf{Circumference=2\pi r}}}`


`\huge{\boxed{\bf{Circumference=\pi D}}}`


`\pi` is approximately 3.14
r is radius
D is diameter

and just a side note,
`\huge{\boxed{\bf{2 r = D}}}`
Hope that formula helps you :)