STRAIGHT LINES | POINT OF INTERSECTION OF TWO LINES, CONDITION OF CONCURRENCY OF TWO LINES, LINE PARALLEL & PERPENDICULAR TO A GIVEN LINE, EQUATION OF BISECTOR OF THE ANGLE BETWEEN THE LINES, POSITION OF A POINT RELATIVE TO A PLANE | Find the point of intersection of two lines by substitution and cross multiplication method., Condition for concurrency of three lines., Line Parallel to a given line., Line Perpendicular to a given line., Foot of perpendicular on a given line., Condition of line to be parallel,perpendicular and intersecting., Find the image of the point with respect to line mirror., Find the position of a point relative to a line (ax+by+c=0).