set square
Noun: 1. A drawing instrument: A flat, triangular piece of plastic or metal (or two such pieces connected by a hinge) used in technical drawing and geometry for drawing straight lines and specific angles, most commonly 30°, 60°, 45°, and 90°.
The term "set square" refers specifically to the drawing tool. It is used with a ruler or straightedge to guide the pencil or pen. * The architect used a set square and a ruler to draw the precise right angles for the building's plan. * In geometry class, you will need a protractor, a compass, and a set square. * Place the hypotenuse of the 45-degree set square against the ruler to draw a perfect diagonal line.
- Adjustable set square: A type of set square with a movable arm or head that can be locked at any desired angle, combining the functions of a standard set square and a protractor.
- For complex angles, an adjustable set square is more versatile than a fixed triangular one.
- Triangle (noun): A common synonym for "set square" in American English.
- She aligned the triangle with the T-square to draw perpendicular lines.
- Try square (noun): A woodworking or metalworking tool used for marking and checking 90° angles. It typically has a thick stock (handle) and a thin blade fixed at a right angle.
- Combination square (noun): A multi-purpose measuring tool consisting of a ruler and one or more interchangeable heads (e.g., a square head, a protractor head, a center-finding head).
- Triangle (chiefly US English)
- Drafting triangle
The term "set square" has a very specific meaning as a drawing instrument. It is not used to describe a geometric shape (like "a set of squares") or a fixed, immovable object. Its core function is related to creating and measuring angles in a technical or educational context.
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a try square with an adjustable sliding head
