"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.
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Perpendicular line.
The foot of a perpendicular is the lowest part of the perpendicular [Kinda like the feet of people]||||_____^ This is the point where the foot of the perpendicular meets the line.
A perpendicular line is a straight line that intersects another straight line at right angles or 90 degrees on all four sides.
Line AB is perpendicular to BC. you can say this like; Line AB is at a right angle to BC
A line that makes a right angle
A horizontal line is perpendicular to a vertical line.
The symbol for perpendicular is a straight vertical line resting on a horizontal line just like a 'T' which is upside down.∟ or ┴
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 perpendicular line is two lines that look like a plus +. If they're not perpendicular, they don't cross with 90 degree angles.
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