How to Use a Protractor to Measure Angles - Step-by-Step Guide #3436581 (License: Personal Use)

This instructional diagram illustrates the proper placement of a protractor to measure an angle of 120°, aligning the center point with the vertex and the 0° mark along one side of the angle. The dividing line extends from the center through the measured angle, while curved arrows indicate the counterclockwise direction of measurement. Labels identify key components for educational clarity.

Used in geometry education materials, math tutorials, and online learning platforms to teach angle measurement fundamentals; matches user intent for visual step-by-step guidance on using a protractor.