Show that the line through `(2, -5) and (-2, 5)` is perpendicular to the line through (6, 3) and (1, 1)

Show that the line : through (- 2, 6) and (4, 8) is perpendicular to the line through (8, 12) and (4, 24).

Show that the line joining (2,-5) and (-2, 5) is perpendicular to the line joining (6,3) and (1,1).

Show that the line : through (2, - 3) and (-1, 2) is perpendicular to the line joining (3, 7) and (- 2, 4).

Show that the line : through (0, 0) and (2, 3) is parallel to the line through (2, 2) and (4, 5) .

Show that the joining (2,-5) and (-2,5) is perpendicular to the line joining (6,3) and (1,1) .

Show that the line through the points (-2, 6) and (4, 8) is perpendicular to the line through the points (3,-3) and (5,-9).

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).

The line passing through (-4, -2) and (2, -3) is perpendicular to the line passing through (a, 5) and (2, -1). Find a.

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