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On the existence of polygons with equal angles. (English) Zbl 1136.51016
The authors investigate polygons with equal angles in the Euclidean and hyperbolic plane whose vertices are points of a given set of rays. The present paper gives exact conditions for the case of three and four rays.
MSC:
51M20 Polyhedra and polytopes; regular figures, division of spaces
51M04 Elementary problems in Euclidean geometries
51M10 Hyperbolic and elliptic geometries (general) and generalizations
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