A drafting tool many students already have is a simple plastic protractor. Protractors are instruments that measure angles. Students will need a protractor that can measure at least to the nearest degree. Triangles should be used to lay out lines in 15° increments; otherwise, a protractor can be used. A discussion on angle measurement is included in a later chapter.
![](https://engineeringtechnology.org/wp-content/uploads/2023/05/protractor-1024x566-1.jpg)