Find the centroid of the triangle with vertices (0,0)(0, 0)(0,0), (6,0)(6, 0)(6,0), and (3,9)(3, 9)(3,9).
(3,3)(3, 3)(3,3)
(4,3)(4, 3)(4,3)
(3,4)(3, 4)(3,4)
(2,3)(2, 3)(2,3)