If a line passing through (4, 1, 2) and (5, k, 0) is perpendicular to the line passing through (2, 1, 1) and (3, 3, -1), then k =

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

The line passing through (0, 2) and (-3, -1) is parallel to the line passing through (-1, 5) and (4,a) . Find a.

Find the equation of the line passing through (2,1,-2) and (5,3,4) and of the plane passing through (2,0,3) , (1,1,5) and (3,2,4) . Also find their point of intersection.

Equations of the line passing through (1,2,3)and (-3,4,3) are

Find the equation of the line passing through A(-2,3) and perpendicular to the line through S(1,2) and T(2,5)

The area (in square units ) of the triangle formed by y-axis , the straight line L passing through (1,1) and (2,0) and the straight line perpendicular to the line L and passing through (1/2, 0) , is

The equation of the line passing through (-3, 5) and perpendicular to the line through the points (1,0) and (-4, 1) is