Answer:
(4,0)
Step-by-step explanation:
Triangle FGH has vertices F (0, 4), G (0, -4), and H (8, -4).
The center of the circle that circumscribes Triangle FGH is the circumcenter of triangle FGH.
This is where the perpendicular bisector of FG (y=0) and the perpendicular bisector of GH(x=4) meets.
Therefore the required coordinates are (4,0)