Print a protractor when there is not one in the pencil case. Each one is marked at every degree, with longer marks at 5 and 10, and has both an outer and an inner scale so you can measure from either side.
Two large half-circle protractors per page, marked to one degree.
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Six smaller protractors on one sheet. Cut apart for a class set.
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A full-circle protractor for reflex angles, bearings and pie charts.
Download PDFTo measure an angle, put the center dot on the vertex (the corner), line the 0 line up with one side of the angle, and read the scale where the other side crosses. Use the scale that starts at 0 on the side you lined up: the outer scale runs from the left, the green inner scale runs from the right.
A paper protractor is not see-through, so it works best one of two ways: cut it out and lay its straight edge along one side of the angle, or print it on transparency film for a clear protractor that works like a plastic one.
Unlike a ruler, a protractor does not need to print at true size. Angles stay the same when a page is scaled, so "Fit to page" is fine here.