A protractor is used to draw and measure angles. An angle is the amount of turn between two lines. Angles are measured in degrees with the symbol °. Angles can be labelled with 3 letters (eg DEF ...

Drafting Measuring tools for drafting, graphing, navigation plotting, or drawing that have sufficient precision ... sets have a series of optional heads (square, center or protractor). Fixed Angle ...

A wide variety of protractors and angle gages are available that vary in construction and application. Angle squares consist of a square with angular graduations along the longest face or hypotenuse.