Protractor
Protractor
Amazon.com : School Smart Plastic 180 Degree Protractor with 4 inch Ruler, Clear, Pack of 12 : Educational And Hobby Protractors : Office Products
A half circle protractor marked in degrees (180).
Angular (Angle)--> https://en.wikipedia.org/wiki/File:Angular_dia_formula.JPG and you use a Protractor to measure an angle--->
School Smart Plastic 180 Degree Protractor with 4 inch Ruler, Clear, Pack of 12
protractor and ruler:
Protractor
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