Slopes of line perpendicular to the x-axis are undefined.
A horizontal line is perpendicular to a vertical line.
Such a line is called a perpendicular bisector.
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.
Line L is parallel to line n.
the line is called the normal
a normal
The line perpendicular to a surface at a point is called the normal
It's called a perpendicular bisector of the line segment.
A line that is at 90 degrees to another line is called a perpendicular line. Perpendicular lines intersect at right angles (90 degrees) forming a "L" shape.
Slopes of line perpendicular to the x-axis are undefined.
'two perpendicular number lines are called'Special:Search
Perpendicular bisector.
A tangent.
a tangent
The horizon runs horizontal. Perpendicular to that is VERTICAL.
Perpendicular line.