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

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

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

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

Verify the following: (-1,2,1),(1,-2,5),(4,-7,8) and (2,-3,4) are 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 (2,6,2) are the vertices of a square.

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.

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