Let ABCD be a parallelogram such that the coordinates of its three vertices A, B, C are (1, 1) , (3, 4) , and (-2, 8) , respectively. Then, the coordi...
Question
Let ABCD be a parallelogram such that the coordinates of its three vertices A, B, C are (1, 1), (3, 4), and (-2, 8), respectively. Then, the coordinates of the vertex D are: