A triangle or set square, as used by engineers or architects to draw straight lines at angles. Variously depicted as a metal, wood, or plastic right triangle with length markings, its hypotenuse to the right.
Commonly applied to a range of disciplines, including art, design, building, architecture, and STEM (science, technology, engineering, and mathematics). May also represent various concepts of angles and measurement.
📅 Triangular Ruler was approved as part of Unicode 6.0 in 2010
and added to Emoji 1.0 in 2015.