Tra từ set square - Từ điển Oxford Advanced Learner 8th

Từ điển Oxford Advanced Learner 8th

set square ˈset square [set square set squares] BrE NAmE (BrE) (NAmE tri·angle) noun an instrument for drawing straight lines and angles, made from a flat piece of plastic or metal in the shape of a triangle with one angle of 90° See also: ↑triangle