A set square is a triangular tool used in drawing and drafting to create precise angles. Typically made of plastic or metal, it features two straight edges that form a right angle (90 degrees) and can also have additional angles, such as 45 degrees. Set squares are commonly used by architects, engineers, and students to ensure accuracy in their designs and drawings. These tools are often used in conjunction with a ruler or a straightedge to draw lines at specific angles. Set squares come in various sizes and styles, making them versatile for different tasks. They are essential for anyone needing to create geometric shapes or technical illustrations.