00656naa#a2200169#i#450# EN\INFRA-M\bibl\41230 20241116011129.6 2500-0489 20210125b2021####ek#y0engy0150####ca RU Influence of an engineering problem on the formation of students' conceptual thinking in the process of geometric and graphic teaching Journal article Moscow INFRA-M Academic Publishing LLC. 2021 5 с. Journal article local Общие вопросы математических и естественных наук. 50 Vereschagina T. A. naukaru.ru