If the coordinates of the endpoints of a diameter of the circle areknown, the equation of a circle can be found.First, I need to know the midpoint of thediameter, which is the center of the circle. Then find theradius, which is the distance from the center to either endpoint of the diameter. Finally I need to use thecenter-radius form to find the equation.

Finding thecenter-radius form for the circle having the endpoints ( 1,8) and (3,6) of a diameter. equation?