Pronunciation: [sˈɛt skwˈe͡ə] (IPA) 
The word "set square" is spelled /sɛt skwɛər/. The first part of the word, "set," is pronounced with a short e sound (/ɛ/), followed by a t sound (/t/). The second part, "square," is pronounced with a long a sound (/skwɛər/), followed by the r sound (/r/). The word refers to a tool used in drawing that has two arms, usually at right angles, and is used to measure or draw straight lines.
A set square is a mathematical instrument used in geometry and technical drawing that consists of two arms meeting at a right angle to form a perfect square. These arms are typically made of transparent plastic or durable material and have measurements marked on their surfaces.
One arm of the set square is longer than the other, with markings extending along its length indicating different units of length, such as centimeters or inches. The longer arm is known as the hypotenuse, while the shorter one is referred to as the base. The junction point where the two arms meet is called the vertex.
This instrument is primarily used in technical drawing to create and measure accurate right angles, straight lines, and perpendicular lines. With a set square, it is possible to draw parallel lines and construct geometric shapes with precise angles and measurements. Its transparency allows for easy alignment and measurement of lines and angles against the grid or paper beneath.
Set squares are commonly used in fields like architecture, engineering, and design, where precise measurements and geometric constructions are crucial. They are essential tools in projects involving accurate drawings, such as floor plans, elevations, and mechanical designs. Set squares come in various sizes, ranging from small handheld ones for quick measurements to larger, adjustable ones for more complex designs.
The word "set square" is a compound word consisting of "set" and "square".
The term "set" can be traced back to the Old English word "settan" which means "to put in a fixed position" or "to place". It later evolved to Middle English "setten" with similar meanings. So, "set" in "set square" conveys the idea of placing or fixing something in position.
The word "square" derives from the Latin word "quadrus", meaning "a square". It entered Middle English through Old French as "esquare" and eventually became "square" as we know it today. In the context of a set square, "square" refers to the geometric shape with right angles.
Combining these components, the term "set square" can be understood as an instrument used for positioning or fixing something at a right angle.
