%0 Journal Article %T Je£żabek Hyperbola of a Triangle in an Isotropic Plane %A Kolar-Begovi£ż %A Zdenka %A Kolar-£żuper %A Ru£żica %A Volenec %A Vladimir %J - %D 2018 %R 10.31896/k.22.2 %X Sa£żetak In this paper, we examine the Je£żabek hyperbola of an allowable triangle in an isotropic plane. We investigate different ways of generating this special hyperbola and derive its equation in the case of a standard triangle in an isotropic plane. We prove that some remarkable points of a triangle in an isotropic plane lie on that hyperbola whose centre is at the Feuerbach point of a triangle. We also explore other interesting properties of this hyperbola and its connection with some other signi cant elements of a triangle in an isotropic plane %K allowable triangle %K standard triangle %K Je£żabek hyperbola %U https://hrcak.srce.hr/index.php?show=clanak&id_clanak_jezik=313751