You know circles are round. This is pretty simple. But, the mathematical description of circles can get quite confusing, since there
is a set equation for a circle, including symbols for the radius, and center of the circle.
This page will show you how these items reflect the final look of a circle on a plot.
To the right are all possible combinations of equations for a circle. Fill in the one that looks most like the one
you re working on, then click "Draw It!"