Triangular Ruler (Set Square) Illustration - Educational Drawing Tool #3527519 (License: Personal Use)

This black-and-white line drawing depicts a classic triangular ruler, also known as a set square, with graduated markings along its longest edge and a smaller triangular cutout near the top-left corner. The rough, hand-drawn style suggests it’s intended for educational or instructional use rather than technical precision. The image emphasizes functionality and accessibility for learners.

Used in educational websites, math curriculum pages, or DIY drafting guides to illustrate basic geometry tools; matches user intent for visual explanations of school supplies or drawing instruments.