ˈset square BrE AmE noun [countable] British English
a flat piece of plastic or metal with three sides and one angle of 90°, used for drawing or testing angles SYN triangle American English
ˈset square BrE AmE noun [countable] British English
a flat piece of plastic or metal with three sides and one angle of 90°, used for drawing or testing angles SYN triangle American English
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012