Question

finding equation of a circle from endpoints of a diameter?

Answer 1

you should probably be more specfic as to what specifically you want. the standard equation for a circle is (x-a)^2+(y-b)^2=r^2 where r is the radius and (a,b) are the coordinates for its center. From the end points you can find the center of the circle and also its radius. It might help to graph the end points to see the center.