What is the circumference of a circle with a radius of 11?

Question

57080 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2018-04-23T15:54:54

#68.1#

There's a special formula for the circumference of a circle, and it is:

enter image source here

#C = 2pir#

#"r = radius"#

The problem tells us that #r = 11#, so just plug that into the equation and solve:

#C = 2pir#

#C = 2pi(11)#

#C = 22pi#

#pi# is approximately #3.14#, so multiply:

#C = 22(3.14)#

#C = 68.08 rarr 68.1#

The circumference is approximately #68.1#.