Okay. So, the circumference equals pi * diameter. What we would have to do is divide 27 by pi (3.14). When you divide, you should get 8.598 and other numbers behind it or 8.6 when rounded to the nearest tenth. The radius is half of the diameter, so you do 8.6/2. When you do that, your quotient should be 4.3. The radius of a circle with a circumference of 27 in. is 4.3 in.
