The vertices of a triangle are the points of intersection of the line y = -x-1, the line x=2, and \(y = \frac{1}{5}x+\frac{13}{5}.\) Find an equation of the circle passing through all three vertices.

Have you worked out what the vertices are yet?

They are (2, 3); (-3, 2); and (2, -3)

Here is a picture and text to show you how to do it.

http://mathcentral.uregina.ca/QQ/database/QQ.09.07/s/kathryn1.html