⊥
Symbol  Format  Data 

⊥  Code Point 
U+22A5 
TeX 
\perp 

SVG 
In geometry, the perpendicular symbol is used to show that two lines are perpendicular to each other. Typically the perpendicular symbol is used in an expression like this:
In plain language, this means that the line is perpendicular to the line . Read more…
The right tack symbol.
The left tack symbol.
Raised interpolation marker
The symbol for two perpendicular lines is a horizontal line with another line drawn perpendicular to it.
A perpendicular angle is visually denoted by drawing a square at the vertex of the angle. The measured angle is equal to π/2 radians or 90°.