n.a
flat triangular
instrument used in drafting and architectural
work that has one
right angle (90 degrees) and the other angles of either 60 and 30 degrees or both 45 degrees. The set
square is used as a guide for drawing
lines at any of the above mentioned angles.
a
flat triangular
instrument, with one
right angle and the other angles of either 60 and 30 degrees or both of 45 degrees, used in
mechanical or architectural drawing.