How to Use a Protractor to Measure Angles - Visual Guide #112009 (License: Personal Use)

This educational diagram illustrates the correct placement and usage of a protractor to measure a 120-degree angle. Key components-center point, dividing line, and the rotating arm-are clearly labeled to show alignment with the angle’s vertex and arms. Arrows indicate clockwise and counterclockwise measurement directions, reinforcing proper technique in geometry practice.

Used in math education webpages, geometry tutorials, or STEM learning platforms to teach angle measurement; targets students, teachers, and self-learners seeking visual reinforcement of protractor use.