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

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

Show that the points (0,3) , (-2,-2) and (2,8) are collinear. Also find the equation of line through these points.

Show that the points (1,2,3),(7,0,1) and (−2,3,4) are collinear.

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

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

Prove by using distance formula that the points P(1,2,3),Q(-1,-1,-1)a n dR(3,5,7) are collinear.

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

Using direction ratios show that the points A(2,3,-4), B(1,-2,3) and C(3,8,-11) are collinear.

Show that the points (1, 1), (2, 3) and (5, 9) are collinear.

Using distance formula, show that the points (1,5), (2,4) and (3,3) are collinear.