Prove that the points `(-1, -2), (-2, -5), (-4, -6) and (-3, -3)` are the vertices of a parallelogram.

Prove that the points (3,\ -2),\ (4,\ 0),\ (6,\ -3) and (5,\ -5) are the vertices of a parallelogram.

Prove that the points (3, 2), (6, 3), (7, 6) and (4, 5) are the vertices of a parallelogram. Is it a rectangle?

Prove that the points (3, 2), (6, 3), (7, 6) and (4, 5) are the vertices of a parallelogram. Is it a rectangle?

Prove that the points (-2, -1), (1, 0), (4, 3) and (1, 2) are the vertices of a parallelogram.

Prove that the points (-2, -1), (1, 0), (4, 3) and (1, 2) are the vertices of a parallelogram.

Prove that the points (4, 8), (7, 5) , (1, -1) and (-2, 2) are the vertices of a parallelogram.

Prove that the points (4, 8), (7, 5) , (1, -1) and (-2, 2) are the vertices of a parallelogram.

Using the slope of line, show that the points (-1,-2) , (0,4) , (3,3) and (2,-3) are the vertices of a parallelogram.

Using the slope of line, show that the points (-1,-2) , (0,4) , (3,3) and (2,-3) are the vertices of a parallelogram.

Show that the points (3, -1, -1), (5,-4, 0), (2, 3, -2) and ( 0, 6, -3) are the vertices of a parallelogram*.