The coordinates (1,1)  (4,1)  and  (5,3) form three vertices of a parallelogram. What are the coordinates of the fourth vertex?

The coordinates (-1,1)  (0,-1)  and  (2,-1) form three vertices of a parallelogram. Which coordinates of a fourth vertex would form a parallelogram?

The coordinates (-2,-2)  (-4,-2)  and  (-3,2) form three vertices of a parallelogram. Which coordinates of a fourth vertex would form a parallelogram?

The coordinates (-6,0)  (-6,4)  and  (-2,4) form three vertices of a rectangle. Which coordinates of a fourth vertex would form a rectangle?

The coordinates (-6,0)  (-4,2)  and  (-2,2) form three vertices of a parallelogram. Which coordinates of a fourth vertex would form a parallelogram?

The coordinates (2,2)  (1,0)  and  (4,0) form three vertices of a parallelogram. Which coordinates of a fourth vertex would form a parallelogram?

The coordinates (1,3)  (0,5)  and  (4,5) form three vertices of a parallelogram. Which coordinates of a fourth vertex would form a parallelogram?

The coordinates (3,2)  (1,5)  and  (4,5) form three vertices of a parallelogram. Which coordinates of a fourth vertex would form a parallelogram?

The coordinates (4,-1)  (2,2)  and  (6,2) form three vertices of a parallelogram. Which coordinates of a fourth vertex would form a parallelogram?

The coordinates (4,-1)  (4,2)  and  (8,2) form three vertices of a rectangle. Which coordinates of a fourth vertex would form a rectangle?