Question

Which formula should be used to find the circumference of a circle? C = pi dC = 2 pi dC = pi rC = StartFraction pi over d EndFraction

Answer 1

For this case the correct formula for the circumference of a circle is given by:

`C=2\pi r=2\pi\cdot(d)/(2)=\pi d`

Then the best option would be:

C = pi d