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Protractor is a device for measuring the size of angles or drawing angles of specified sizes. Protractors are made of plastic, paper, or metal. Most protractors are shaped like the letter D, with the arc in the shape of a semicircle. Lines and numbers on the arc indicate angles from 0 to 180 degrees (or, in some cases, from 0 to 3,200 mils). More »
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Game theory is a method of studying decision-making situations in which the choices of two or... More >>
Mathematics is one of the most useful and fascinating divisions of human knowledge. It includes... More >>
New mathematics was an educational movement during the late 1950's and the 1960's that attempted... More >>
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