There's no such thing as one perpendicular line. "Perpendicular" tells the relationship
between two lines, or between a line and a plane.
Two lines are perpendicular if they form a 90-degree angle where they cross.
Perpendicular line.
A horizontal line is perpendicular to a vertical line.
A line is perpendicular to another line when it is at an angle of 90° to the other line. + (that plus sign is an example of a perpendicular line)
A horizontal line is a line perpendicular to the vertical.
A line is perpendicular to a plane when it is perpendicular on two lines from the plane
A perpendicular line is one that is at right angle to another - usually to a horizontal line. A perpendicular bisector is a line which is perpendicular to the line segment joining two identified points and which divides that segment in two.
The perpendicular postulate states that if there is a line, as well as a point that is not on the line, then there is exactly one line through the point that is perpendicular to the given line.
A sole line can't be perpendicular. To be perpendicular, a line has to meet with another line, to form right angles on either side. Perpendicular is the exact opposite of parallel. Parallel: = Perpendicular: -|
"Perpendicular" is a straight line at a 90 degree angle from a line it touches or intersects. There is no line "straighter" than a perpendicular line, that I know of.
perpendicular bisector
A perpendicular line is 90 degrees. Anything less or more is not perpendicular.
If the line has a slope of 2, then the perpendicular line has a slope of -1/2. The slope of a perpendicular line is the negative reciprocal. Another example would be if the slope of a line is -1/4, then the slope of the perpendicular is 4.