Question

not sure how to answer this. Hope someone can help

Answer 1

There are actually two formulas for the circumference of a circle. One is the given C = πd, whereas the other is C = 2πr.

Here you're given the radius, not the diameter. Thus, find the circumference using C = 2πr, which here comes to:

C = 2(3.14)(1.8 m) = 11.30 m

Answer 2

so, it's asking for the circumference of a circle with a radius of 1.8 m. using the formula C = πd while using 3.14 for π. So, what we need to do first is turn the radius to a diameter by doing 1.8 * 2 = 3.6. Now we replace π with 3.14 in the formula. Since we have the diameter, we can replace the d with it. Our end result is C = 3.6 * 3.14

When we do 3.6 * 3.14, we get 11.304.
So, the circumference is 11.304 meters.