Question

The radius of a circle is 14. Using π, which equation expresses the ratio of the circumference of the circle to the circle's diameter?

Answer 1

Answer:

$\dfrac{c}{28}=\pi$

Step-by-step explanation:

The circumference $c$ of circle of radius $r$ is given by

$c=2\pi r$,

and the diameter $d$ is 2 times the radius:

$d=2r$.

Therefore, the ratio of the circumference to the diameters is

$\dfrac{c}{d}=\dfrac{2\pi r}{2r}$

$\dfrac{c}{d}=\pi$.

Putting in $d= 2r =28$, we get

$\boxed{ \dfrac{c}{28}=\pi}$