PARALLEL LINES If two lines not having any common point on the same plane then these lines are called Parallel Lines. The angle between two parallel line is 0 ^ 0 or 〖 180 〗 ^ 0 Lines which do not intersect are called Parallel lines. The relation is parallel to is denoted by the symbol " ∥ " and is read as is parallel to. If two lines are drawn in plane such that they do not intersect, even when extended is definitely in both the directions, then such lines are called parallel lines. If lines l and m are parallel, we show them by marking arrows on the lines pointing in the same directions and we write, l∥m read as ‘ l is parallel to m’. The perpendicular distance betw...