Examine the diagram and information to answer the question.
A circle in the coordinate plane has a radius of 5 and a center at point (5,4).
Point (x,y) lies on the circle.
The triangle formed by points (5,4), (5,y) and (x,y) is a right triangle.
What is the equation of the circle?
Match the expression or equation to the steps used to find the equation of the circle
