set square
noun
a thin flat piece of plastic, metal, etc, in the shape of a right-angled triangle, used in technical drawing
Words nearby set square
set out,
set piece,
set right,
set sail,
set shot,
set square,
set store by,
set straight,
set the pace,
set the record straight,
set the scene for
Example sentences from the Web for set square
For this purpose a tee-square and set-square are required, together with a pair of spring dividers and a sharply-pointed HB.
Illumination and its Development in the Present Day |Sidney FarnsworthThen the margins at the top and the two sides must be marked out, and the upright lines drawn in by means of the set-square.
Illumination and its Development in the Present Day |Sidney FarnsworthAnd it is important that you should get these straight-edges at a true right angle, testing them carefully with the set-square.
Stained Glass Work |C. W. Whall