Using direction numbers show that the points `P(4, 7, 8) and Q(2, 3, 4), R(-1, -2, 1) and S(1, 2, 5)` taken in ordethe vertices of a parallelogram. Is the parallelogram rectangle?

Using direction numbers show that points P(4, 7, 8) and Q(2, 3, 4), R(-1, -2, 1) and S(1, 2, 5) taken in order, are the vertices of a parallelogram. Is the parallelogram a rectangle?

Prove that the points ( 4 , 7 , 6) , ( 2 , 3 , 2 ) , ( - 1, -2, -1) and ( 1, 2 , 3) taken in order are the vertices of a parallelogram . Is the the parallelogram a rectangle?

Show that the points : (4, 7, 8), (2, 3, 4), (- 1, - 2, 1), (1, 2, 5) are the vertices of a parallelogram.

Show that the points (-2,-1),(5,4),((6,7) and (-1,2) are the vertices of a parallelogram .Is the parallelogram a rectangle ?

Show that the points (4,7,8), (2,3,4),(-1,-2,1) and (1,2,5) taken in order from a parallelogram. Do these points form a rectangle.

Show that P(3,4), Q(7, -2), R((1,1) and S(-3, 7) are the vertices of a parallelogram.

By vector method, show that the four points (7, 2, -3), (6, 1, 4), (-3, -4, -1) and (-2, -3, -8) are the vertices of a parallelogram.

Using direction ratios show that the points P(2, 3, 4) Q(-1, -2, 1) and R(5, 8, 7) are collinear.

Show that the points A(7 , 3) , B (6 , 1) , C ( 8 , 2) and D ( 9 , 4) taken in that order are vertices of a parallelogram . (AS_(2))

Show that P(3,4),Q(7,-2),R(1,1) and S(-3,7) are the vertices of a parallelogram.