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.

Show that the points A(1,3),B(2,6),C(5,7) and D(4,4) are the vertices of a rhombus .

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

Without using distance formula, show that points (-2,-1) , (4,0) ,(3,3) and (-3,2) are the vertices of a parallelogram.

Without using distance formula, show that points (-2, -1) , (4, 0) , (3, 3) " and " (-3, 2) are the vertices of a parallelogram.

Prove that the points A(0,-1),B(-2,3),C(6,7) and D(8,3) are the vertices of a rectangle ABCD .

Show that the points A(1,3,2),B(-2,0,1) and C(4,6,3) 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.

If the points A(6, 1), B(8, 2), C(9, 4) and D(p, 3) are the vertices of a parallelogram, taken inorder, find the value of p.

Show that the points A(1,2,7),B(2,6,3) and C(3,10,-10 are collinear.

Show that the points A(-1,4,-3), B(3,2,-5) C(- 3,8,-5) and D (-3,2,1) are coplanar