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In geometry, Dinostratus' theorem describes a property of Hippias' trisectrix, that allows for the squaring the circle if the trisectrix can be used in addition to straightedge and compass. The theorem is named after the Greek mathematician Dinostratus who proved it around 350 BC when he attempted to square the circle himself. The theorem states that Hippias' trisectrix divides one of the sides of its associated square in a ratio of .

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  • Satz des Dinostratos (de)
  • Dinostratus' theorem (en)
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  • Der Satz des Dinostratos beschreibt eine Eigenschaft der Quadratrix des Hippias, die es ermöglicht diese zur Quadratur des Kreises zu verwenden. Er ist nach dem griechischen Mathematiker Dinostratos benannt, der ihn um 350 v. Chr. bewies und auch selbst zur Quadratur des Kreises verwandte. Der Satz besagt, dass die Quadratrix die Seite ihres zugehörigen Quadrates im Verhältnis teilt. (de)
  • In geometry, Dinostratus' theorem describes a property of Hippias' trisectrix, that allows for the squaring the circle if the trisectrix can be used in addition to straightedge and compass. The theorem is named after the Greek mathematician Dinostratus who proved it around 350 BC when he attempted to square the circle himself. The theorem states that Hippias' trisectrix divides one of the sides of its associated square in a ratio of . (en)
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  • Der Satz des Dinostratos beschreibt eine Eigenschaft der Quadratrix des Hippias, die es ermöglicht diese zur Quadratur des Kreises zu verwenden. Er ist nach dem griechischen Mathematiker Dinostratos benannt, der ihn um 350 v. Chr. bewies und auch selbst zur Quadratur des Kreises verwandte. Der Satz besagt, dass die Quadratrix die Seite ihres zugehörigen Quadrates im Verhältnis teilt. Überliefert ist nur die Form des Beweises bei Pappos (Sammlung, Buch 4, 30–32), der die Quadratur des Kreises mit dieser Kurve aber Dinostratos zuschreibt. Nach Ivor Bulmer-Thomas wäre das einer der frühesten Widerspruchsbeweise (die Euklid viel verwendete) der antiken Mathematik. (de)
  • In geometry, Dinostratus' theorem describes a property of Hippias' trisectrix, that allows for the squaring the circle if the trisectrix can be used in addition to straightedge and compass. The theorem is named after the Greek mathematician Dinostratus who proved it around 350 BC when he attempted to square the circle himself. The theorem states that Hippias' trisectrix divides one of the sides of its associated square in a ratio of . Arbitrary points on Hippias' trisectrix itself however cannot be constructed by circle and compass alone but only a dense subset. In particular it is not possible to construct the exact point where the trisectrix meets the edge of the square. For this reason Dinostratus' approach is not considered a "real" solution of the classical problem of squaring the circle. (en)
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