Question

How do I find the radius of a circle from its circumference?

Answer 1

Finding the radius of the circle:

Let the circumference of the circle be $C$.

We know that,

$C=2\mathrm{\pi r}$

$\Rightarrow \frac{\mathrm{C}}{2\mathrm{\pi }}=\mathrm{r}$ where, $r$ is the radius of the circle.

Hence, by using $C=2\mathrm{\pi r}$, we can find out the radius of the circle as $\frac{\mathrm{C}}{2\mathrm{\pi }}=\mathrm{r}$.