TY - JOUR T1 - Cesty k důkazům matematických vět A1 - Odvárko, Oldřich A1 - Robová, Jarmila JA - Obzory matematiky, fyziky a informatiky Y1 - 2018 VL - 47 IS - 1 SP - 1 EP - 7 SN - 1335-4981 N2 - The article deals with justification and proving in secondary school mathematics. Different approaches to solving proof tasks are illustrated by several examples. The active approach of pupils is emphasized during solving these problems. ER -