Tomahawk (geometric Shape)
The tomahawk is a tool in geometry for angle trisection, the problem of splitting an angle into three equal parts. The boundaries of its shape include a semicircle and two line segments, arranged in a way that resembles a tomahawk, a Native American axe. The same tool has also been called the shoemaker's knife, but that name is more commonly used in geometry to refer to a different shape, the arbelos (a curvilinear triangle bounded by three mutually tangent semicircles).
Other articles related to "tomahawk":
... The inventor of the tomahawkis unknown,but the earliest references to it come from 19th-century France ... It dates back at least as far as 1835,when it appeared in a book by Claude Lucien Bergery,GĂomĂtrie appliquĂe a l'industrie,a l'usage des artistes et des ouvriers 3rd edition) ...