It's a horizontal line with a vertical extending from the middle of it upward. Like an underscore-pipe-underscore, _|_.
ABâ”´CDThe symbol for perpendicular in mathematics is an inverse T
Pierre
Two lines that are not parallel are perpendicular. The symbol is +.
Pierre
It is the symbol for 'perpendicular'.
The only "mathematical" (it's really more geometrical) symbol I can think of fitting the description means "perpendicular."
For two items (Planes, lines, line segments, ect.) to be perpendicular that means that they meet at a 90 degree angle. Perpendicularity is denoted by the ⊥ symbol. For example line AB ⊥ line CD would mean that the line AB would be perpendicular to the line CD.
Perpendicular means that two lines intersect like an X but its just perpendicular
An inverted capital T
It is a vertical line touching a horizontal line
An inverted "T"
You would use this: ┴