Description C-Thru Goniometer Quick Angle Protractor, 7″ Legs rotate around protractor scale to read angles. 7″ arms open to 12″. Includes inch and metric scales. A protractor is a measuring instrument for measuring angles. Most protractors measure angles in degrees (°). Most protractors are divided into 180 equal parts. They are used for a variety of mechanical and engineering-related applications, but perhaps the most common use is in geometry lessons in schools. Related
