The coordinates of the centroid of a triangle with vertices (0,0),(6,0),(0,0), (6,0),(0,0),(6,0), and (0,9)(0,9)(0,9) are:
(3,4.5)(3,4.5)(3,4.5)
(2,3)(2,3)(2,3)
(3,3)(3,3)(3,3)
(1,1)(1,1)(1,1)