# What is the equation of a circle with a radius of 5?

Sep 13, 2014

If the equation is in standard form it would look like ...

${\left(x - h\right)}^{2} + {\left(y - k\right)}^{2} = {r}^{2}$

$\left(h , k\right)$ is the center of the circle

To answer the question the equation of a circle with a radius of 5 would look like either of the following ...

${\left(x - h\right)}^{2} + {\left(y - k\right)}^{2} = {5}^{2}$

or

${\left(x - h\right)}^{2} + {\left(y - k\right)}^{2} = 25$