Question

Find the exact circumference of a circle with the given radius.

3¼ inches

C =

6.25π in.
6.5π in.
23.25π in.

Answer 1

circumference = 2*pi*r

Answer 2

What is the formula for finding circumference of a circle?

Answer 3

c=pi x r^2

Answer 4

I think

Answer 5

nope, pi(r^2) is area, not circumference

circumference = 2*pi*r

Answer 6

oh haha thanks. How would you solve that?

Answer 7

radius = 3 1/4 inches

circumference = 2*pi*radius

plug in radius and multiply

Answer 8

thanks!