| 单词 | Compass |
| 释义 | CompassA tool with two arms joined at their ends which can be used to draw Circles. In GeometricConstructions, the classical Greek rules stipulate that the compass cannot be used to mark offdistances, so it must ``collapse'' whenever one of its arms is removed from the page. This results in significantcomplication in the complexity of Geometric Constructions. See also Constructible Polygon, Geometric Construction, Geometrography, Mascheroni Construction,Plane Geometry, Polygon, Poncelet-Steiner Theorem, Ruler, Simplicity, SteinerConstruction, Straightedge
Dixon, R. ``Compass Drawings.'' Ch. 1 in Mathographics. New York: Dover, pp. 1-78, 1991. |
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