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On Some Properties of the First Brocard Triangle in the Isotropic Plane

Author

Listed:
  • Vladimir Volenec

    (Department of Mathematics, University of Zagreb, Bijenička cesta 30, 10 000 Zagreb, Croatia
    These authors contributed equally to this work.)

  • Zdenka Kolar-Begović

    (Department of Mathematics, University of Osijek, Trg Lj. Gaja 6, 31 000 Osijek, Croatia
    These authors contributed equally to this work.)

  • Ružica Kolar-Šuper

    (Faculty of Education, University of Osijek, Cara Hadrijana 10, 31 000 Osijek, Croatia
    These authors contributed equally to this work.)

Abstract

In this paper we introduce the first Brocard triangle of an allowable triangle in the isotropic plane and derive the coordinates of its vertices in the case of a standard triangle. We prove that the first Brocard triangle is homologous to the given triangle and that these two triangles are parallelogic. We consider the relationships between the first Brocard triangle and the Steiner axis, the Steiner point, and the Kiepert parabola of the triangle. We also investigate some other interesting properties of this triangle and consider relationships between the Euclidean and the isotropic case.

Suggested Citation

  • Vladimir Volenec & Zdenka Kolar-Begović & Ružica Kolar-Šuper, 2022. "On Some Properties of the First Brocard Triangle in the Isotropic Plane," Mathematics, MDPI, vol. 10(9), pages 1-13, April.
    • Handle: RePEc:gam:jmathe:v:10:y:2022:i:9:p:1381-:d:797895
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