Word: trisecting
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Dates: during 1940-1949
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...Freshman year here Sleeper saw an attempted trisection by means of straight lines and knew that such a means was impossible. Searching for the error of the method, he discovered the inadequacy of the straight line and also hit upon a logical pattern resulting in a locus curve which would accurately trisect any angle...
Other curves have been discovered which will do what Sleeper's will, but the value of the latter lies in its simplicity of construction and equation. Upon this simple curve, Sleeper has been able to design an instrument which will automatically trisect any given angle. The apparatus is a simple two-piece device which, when placed correctly over the angle, shows where the lines of trisection are to be drawn...
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