2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/107614The aim of the paper is to give a synthetic proof that in a symmetric Minkowski plane the Benz's (G) axiom holds (without using the algebraic representation).12 fig. accepted to Abh. Math. Sem. Univ. HamburgCombinatoricsMetric Geometry51B20text