To no one's surprise, those clear plastic protractors we were all taught to use in grade school are far from being the most accurate way to measure an angle. They're perfect for a grade five homework assignment, but in the real world you'll probably want to
opt for this digital alternative that's precise to plus or minus 0.3 degrees.
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Source: http://feeds.gawker.com/~r/gizmodo/full/~3/gXKJJcXoCUw/digital-protractor-promises-more-accuracy-than-a-plastic-half-circle
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