Show that the line thorugh the points (4,7,8) and (2,3,4)` is parallel to the line through the points (-1,-2,1) and (1,2,5)`.

Show that the line through points (4,7,8) and 2,3,4 ) is parallel to the line through the points (-1,-2,1) and (1,2,5) .

Show that the line through the point (4, 7, 8) and (2, 3, 4) is parallel to the line through the points (-1, -2, 1) and (1, 2, 5).

Show that the line through the points (4,7,8),(2,3,4) is parallel to the line through the points (-1,-2,1) (1,2,5)

Show that the line through the points (5, 6) and (2, 3) is parallel to the line through the points (9,-2) and (6,-5).

The value of 'p' such that the line passing through the points (-4,p)and (1,3) is parallel to the line passing through the points (-2,5)and (8,7) is

Show that the line thorugh the points (1,-1,2) and (3,4,-2) is perpendicular to the line through the points (0,3,2)andf (3,5,6).

Show that the line through the points (1,-1,2) and (3,4-2) is perpendicular to the line through the points (0,3,2) and (3,5,6).

Show that the line through the points (-2,6) and (1,7) is perpendicular to the line through the points (3,-3) and (5,-9).

Show that the line joining the points A(4,8) and B(5,5) is parallel to the line joining the points C(2,4) and D(1,7).

Show that the line joining the points (4,5) and (1,2) is parallel to the line joining the points (9,-2) and (12,1) .