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Originally invented by Laisant in 1875, the trisector of Yates (1938) is a mechanical device (linkage) to exactly trisect an angle. Changing the value of the opening up to 269 degrees, the gray lines trisect the chosen angle.
Contributed by: Jaime Rangel-Mondragon (March 2011)
Open content licensed under CC BY-NC-SA
Wolfram Demonstrations Project
Published: March 7 2011