Protractor (noun)

A device used for measuring angles, typically in degrees.

Origin:

Early 18th century: from latin protractor, from protrahere "draw out".

Examples:

1. The student was instructed to use a protractor to measure the angles of the geometric shapes.
2. He was a skilled carpenter and always used a protractor to ensure that his cuts were precise.
3. The protractor was a key tool for the engineers as they needed to measure angles accurately to build their structures.
4. She was having trouble understanding how to use a protractor, so her teacher provided her with a hands-on demonstration.
5. The protractor is a device that can measure angles in degrees, it's composed of a base and a rotating arm.