Question

Parallelogram ABCD is placed on a coordinate grid. A (5, -1), B (7, 4), and C (7, 8).

Find the coordinates for D.

Answer 1

(5, 3)

Explanation:

`\vec{AB}=(2, 5) \\ \\ \vec{CD}=-\vec{DC}=-\vec{AB}=(-2, -5) \\ \\ \therefore D(7-2, 8-5)=(5, 3)`