Triangular Ruler Illustration - Educational Geometry Tool #295386 (License: Personal Use)

This black-and-white line drawing depicts a standard set square (triangular ruler) commonly used in geometry and technical drawing. The outer edges feature evenly spaced tick marks indicating unit measurements, while the inner triangular cutout allows for easy alignment and repeated angle replication. The sketch style suggests educational or instructional use, emphasizing function over realism.

Used in educational websites, math curriculum pages, STEM resource hubs, or printable worksheets to illustrate geometric tools; targets students, teachers, and DIY learners seeking visual aids for angle measurement and construction.