The right angle symbol is used to denote a right angle.
Right Angle Symbol (∟)
Right Arrow Symbol png download - 512*512 - Free Transparent Bracket png Download. - CleanPNG / KissPNG
∟ Right Angle Corner Symbol Smiley Face U+221F
Right Angles – GeoGebra
GitHub - maddybartlett/math-symbols: List of math symbols for copy and paste from the symbol keyboard.
Right Angle - Definition, Properties, Shape, Examples
Angle - Wikipedia
Angle Facts for GCSE Maths Exam - SchoolOnline
Judging by appearance, name in this order) an acute angle, an obtuse angle, and a right angle: