Question

Let A(4,1), B(3,6), and C(9,8) be three points in a coordinate plane. Find the coordinates of a point D such that the points A,B,C, and D form a parallelogram with
(A) AB as one of the diagonals
(B) AC as one of the diagonals
(C) BC as one of the diagonals

(A) The coordinates of point D are (?,?)
(B) The coordinates of point D are (?,?)
(c) The coordinates of point D are (?,?)

Answer 1

Please help, anyone