What is the primary purpose of using a protractor in measurement?

The primary purpose of using a protractor is to measure angles. Protractors are designed specifically for this function, featuring a circular or semicircular scale marked in degrees. When you place the protractor's center point on the vertex of the angle and align one side with the baseline, you can read the measurement of the angle formed between the two lines. This tool is essential in various fields, such as geometry, engineering, and drafting, where precise angle measurement is critical.

Other measuring tasks, such as measuring lengths, volumes, or surface areas, require different tools that are specifically built for those purposes, like rulers, measuring cups, or formula calculations respectively. Understanding the distinct function of a protractor emphasizes its importance in angle measurement.