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While only one patent model for a protractor survives in the Smithsonian collections—from an inventor with a colorful personal history—several of the other objects also provide examples of technical ...
This makes them smaller than a right angle. These steps are really important - if the protractor isn’t lined up properly with the angle, you won’t get a correct reading. Step 3: See which ...
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 ...