Maj-Tatsis, B. and Pytlak, M. 2020. Students’ approaches while solving a non-typical geometrical problem. Annales Universitatis Paedagogicae Cracoviensis | Studia ad Didacticam Mathematicae Pertinentia. 12, (Dec. 2020), 197–210. DOI:https://doi.org/10.24917/20809751.12.9.