TY - JOUR T1 - Matematické nástroje: Symetria A1 - Vrábel, Peter JA - Obzory matematiky, fyziky a informatiky Y1 - 2011 VL - 40 IS - 2 SP - 9 EP - 16 SN - 1335-4981 N2 - The symmetry is in mathematics often used. This contribution deals with symmetry as mathematical method that often simplifies solving of problems. The use of this mathematical tactics is illustrated on solutions of various tasks in the paper. ER -