a line with one of its end points extended
a straight line extending from a point
the state of being perpendicular to something
a straight line at right angles to another line
in mathematics, a line on which each point is associated with a real number
a straight line that continually approaches a curve, called
a straight line or plane that touches a curve or curved surface at a point but does not intersect it at that point
a figure made when straight lines cross
in mathematics, a straight line that crosses a curved line or surface at a right angle
a straight line which touches a curved line at a single point called tangent