How to use a protractor?
How to use a protractor |
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Step 1 – Line protractor up with angleOn a protractor the angles are marked with lines which come together in the middle of the line reading 0 degrees. To measure an angle, the “vertex” of the angle must be placed underneath this point. |
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Step 2 – Line up one side of angle with 0° lineEnsure that the base of the angle rests on the line reading 0 degrees. |
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Step 3 – Read angle from protractorThe other side of the angle will now line up with one of the degree markers on the protractor. |
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This will tell you what degree the angle is. | |||
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Protractors traditionally have every degree marked on them. However, usually only every tenth degree has its number marked next to it (i.e.: 10, 20, 30 etc). | |||
