A straightedge is a simple tool used in drawing and measuring straight lines. It is typically a flat, straight piece of material, such as wood, plastic, or metal, without any markings. Unlike a ruler, a straightedge does not have measurement markings, making it ideal for tasks that require precision in creating lines rather than measuring distances. Straightedges are commonly used in various fields, including architecture, engineering, and art. They help ensure accuracy in designs and drawings by providing a reliable guide for creating straight lines. This tool is essential for anyone who needs to produce clean, straight edges in their work.