Show that the points : (1,2),(5,4),(3,8),(-1,6) are the angular points of a square.

Show that the points : P (1, 2), Q (5, 4), R (3, 8) and S (-1, 6) are the angular points of a square PQRS.

Show that the points :- A (2, 1), B (5, 4), C (4, 7) and D(1, 4)are the angular points of a paralleogram. ABCD.

Show that the points (1, 7), (4, 2), (-1,-1) and (-4, 4) are the vertices of a square.

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

Show that the points (2,4,3),(4,1,9) and (10,-1,6) are the vertices of an isosceles right angled triangle.

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

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

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

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