Question

Need help find the crimcumference of each circles round your answer to the nearest tenth.

Answer 1

The formula in getting the circumference of a circle is:

`C=2\pi r`

where r = length of the radius and π = 3.14159.

Since the radius is already given in the circle which is 9.9 km, let's use this value to replace "r" in the formula. Use 3.14159 to replace π as well.

`C=2*3.14159*9.9km`

Then, multiply.

`C=62.203482km\approx62.2km`

Hence, the circumference of the given circle is approximately 62.2 km.