On the theorem of Ptolemaios

DOI10.1007/S000170300004zbMath1028.51022OpenAlexW2317649358MaRDI QIDQ1404166

Roland Stärk

Publication date: 20 August 2003

Published in: Elemente der Mathematik (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1007/s000170300004

zbMATH Keywords

products of opposite sides of a quadranglePtolemaios' theoremquadrangle with circumference

Mathematics Subject Classification ID

Elementary problems in Euclidean geometries (51M04)

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