Show that the points (4, - 3, 1), (2, -4, 5) and (1, -1, 0) form a right angled triangle .

Using slope concept show that the points (1, -4), (2, -3) and (4, -7) form a right angled triangle.

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

Without using the Pythagoras theorem, show that the points (4,4), (3, 5) and (-1,-1) are the vertices of a right angled triangle.

Show that the points A(4, 7 ) B (8,4) and C(7,11) are the vertices of a right angled triangle.

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

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

Show that the points (-3,0), (1,2), (5,-6) and (1,-8) taken in order to form a rectangle.

Check whether points (3, 3), (-4, -1) and (3, - 5) are the vertices of an isosceles triangle.

Show that the points A (1,1,1), B (1,2,3) and C (2,-1,1) are vertices of an isosceles triangle.