Question

Using the formula C = 2πr, find the circumference of a circle with diameter of 28 inches.

Answer 1

well the radius of a circle is half the diameter. so for this problem the radius is 14. So C=2(pi)(14)

Answer 2

Ok, I am still confused??

Answer 3

The circumference of any circle with radius r and diameter d is determined with the formula C=2(pi)r which is also C=(pi)d because when you multiply the radius by 2 you get the diameter. Is this making sense so far?

Answer 4

Ohhhh ok, yes, it does. Thank you! I get it now!!! :)

Answer 5

good. :)