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

Verify the following: (-1,2,1),(1,-2,5),(4,-7,8) and (2,-3,4) are 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.

Show that the coplanar points (0,4,1),(2,3,-1),(4,5,0) and 92,6,2) are the vertices of a square.

Show that the coplanar points (-1,-6,10),(1,-3,4),(-5,-1,1) and (-7,-4,7) are the vertices of a rhombus.

Show that the coplanar points (1,5,2),(3,4,0),(5,6,1) and (3,7,3) are the vertices of a square.

Show that the points (1, 2, 3), (-1, -2, -1), (2, 3, 2) and (4, 7, 6) 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 A(1,2,3),B(-1,-2,-1),C(2,3,2) and D(4,7,6) are the vertices of a parallelogram ABCD but not a rectangle.

Show that the points A(,1,2,3),B(-1,-2,-1),C(2,3,2) and D(4,7,6) are the vertices of a parallelogram ABCD but it is not a rectangle.

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