Protractor Diagram - Educational Geometry Tool for Measuring Angles #3241490 (License: Personal Use)

This black-and-white line drawing depicts a classic 180-degree protractor with two mirrored scales (0-180° left-to-right and right-to-left), enabling angle measurement in either direction. The baseline includes a central alignment mark, and fine tick marks indicate single-degree increments with numerals every ten degrees. Its clean, schematic style makes it suitable for textbooks, worksheets, and digital learning resources.

Used in K-12 math education, instructional materials, and geometry tutorials to demonstrate how to measure and draw angles; matches user intent for printable teaching aids or visual explanations of angle concepts.