Kinds of lines A vertical line is a kind of line that is drawn in upright position. It goes from North to South or vice versa. A kind of line that lies flat on a surface is a horizontal line. It goes from East to West and vice versa. A diagonal is also called as slanted line. This kind of line has inclined position.
Intersecting lines are a pair of lines that meet at a common point. The common is called the point of intersection.
Parallel lines are a pair of lines that go to the same direction. They are equidistant and never intersect.
A pair of intersecting lines (vertical and horizontal)that form four right angles at their point of intersection is called perpendicular lines.