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What is a protractor?
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Shop for Protractor Sets |
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![A blue 180 degree protractor Blue, semi-circle, protractor, 180 degree](data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==) |
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A protractor is an instrument used to measure angles. |
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![A mathematical formula and pen Mathematical formula, pen, maths lessons, protractors](data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==) |
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You may well have used them in your mathematics lessons. |
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![360 degrees "360 degrees" with a blue arrow looping around in a clockwise direction; angles, 360 degrees, protractors;](data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==) |
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Angles are measured in degrees. There are 360 degrees in a full circle. |
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![A plastic semi-circular protractor Plastic, semi-circle, protractor, angles](data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==) |
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Many protractors are a semi-circular shape made from plastic… |
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![180 degree angles Several 180 degree angles; angles, 180 degrees, protractors](data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==) |
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…and can measure up to 180 degrees. |
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![A 360 degree protractor 360 degrees, protractor, angles](data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==) |
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However, it is possible to buy protractors which measure up to a full 360 degrees. |
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In construction, protractors can be found as a part of several tools, including: |
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![A red combination square set A red Faithfull combination square set; rule, ruler, blade, square head, centre head, protractor head](data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==) |
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![A bevel protractor A Mitutoyo bevel protractor; angles, protractor](data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==) |
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![A Starrett protractor and depth gauge A protractor and depth gauge; angles, protractor](data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==) |
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- Protractors and depth gauges
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![A digital angle gauge digital angle gauge with an On/Off button and a "Zero" button; angles, liquid crystal display, magnets](data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==) |
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- Digital protractors (and angle gauges)
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