All about Circles!
Making math fun one lesson at a time with Danielle Perez
Writing equations given the general form of a circle.
Circle equations are often given in the general format of ax^2 + by^2 + cx + dy + e = 0, When you are given this general form of equation and told to find the center and radius of a circle, you will have to "complete the square" to convert the equation to center-radius form. This lesson explains how to make that conversion.