Show that the points `(2,3,4),(-1,-2,1),(5,8,7)` are collinear.

(i) Using section formula, show that the points A(-2, 3,5), B(1,2,3) and C(7,0,-1) are collinear. (ii) Using division formula, prove that the points (2,3,4),(-1,-2,1) and (5,8,7) are collinear.

Using section formula,show that the points A(2,-3,4) B(-1,2,1) and are collinear.

Show that the points (-2,3,5),(1,2,3) and (7,0,-1) are collinear.

Show that the point A(2,-3,-4), B(1,2,3), C(3,-8,-11) are collinear.

Show that the points (3,4),(-5,16),(5,1) are collinear.

show that the points (2,-1,3),(4,3,1) and (3,1,2) are collinear.

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

Show that the points A(2,3,-4) B(1,-2,3) and are collinear.

Show that the points (4,7,8),(2,3,4),(-1,-2,1),(1,2,5) are the vertices of a parallelogram,but not a rectangle.

Show that the points (0,-2) , ( -1,1),(-2,4) are collinear.