- Type: Triangle Set Square
- Size: 31×45 (Typically referring to the angles of the triangle, with 31 representing the base and 45 the angle)
- Material:
- Plastic (Commonly used for lighter weight and transparent set squares)
- Acrylic (For a more durable and scratch-resistant material)
- Metal (Sometimes used for more professional or heavy-duty sets)
- Dimensions:
- The 31×45 set square usually refers to the angles 31° and 45°, commonly found in isosceles triangle set squares.
- Set squares typically come in various sizes, and 31×45 could indicate the specific angle setup for a triangle or might refer to a specific measurement like 31 cm or 31 inches for the longest side.
- Design:
- Transparent design for easy visibility of lines underneath the tool. This helps when drawing and aligning geometrical figures or measuring angles on paper.
- Sharp edges for clean, precise lines when used for drafting and measuring angles.
Key Features:
- Precision Angles: The set square provides accurate 45° and sometimes 31° angles, making it perfect for drawing and measuring precise shapes like triangles, squares, and rectangles.
- Durability: Made from high-quality plastic or acrylic, which ensures that the set square can withstand regular use without bending, breaking, or scratching.
- Easy to Use: Its clear, transparent body makes it easier for students and professionals to align it with the paper or drawing surface underneath, ensuring accurate measurements and constructions.
- Compact Design: The triangle set square is small and lightweight, making it easy to store in a geometry kit or pencil case, and it’s portable enough for use on the go.
- Multi-Purpose Use: Can be used for tasks in geometry, trigonometry, architecture, drafting, and design, where accuracy in angles and straight lines is critical.



