7.(v) Let A (4, 2), B(6, 5) and C(1, 4) be the vertices of . If are the vertices of , find the coordinates of the centroid of the triangle.
From the figure,
Let the median be AD which divides the side BC into two equal parts.
Therefore, D is the mid-point of side BC.
Coordinates of D:
Let the centroid of this triangle be O.
Then, point O divides the side AD in a ratio 2:1.
Coordinates of O: