A(4,3) and B(-4,-3) are the endpoints of the diameter of a circle. Determin the center of the circle and the equation of the circle.
I found the center as (0,0) by using the midpoint formula.
where do i go from here?
Recall the equation of a circle:
where is the coordinate of circle's centre and (not ) is your radius.
You have your centre and you can easily find the radius via the pythagorean theorem (draw a line to the coordinate (4,3) and a right-angled triangle can be constructed) or the distance formula. Whichever.