Iziumchenko L, Tkachevska A. DIFFERENT WAYS OF SOLVING PROBLEMS AS A TOOL FOR FORMING FLEXIBILITY OF THINKING (ON THE EXAMPLE OF A GEOMETRIC PROBLEM). OIP [Internet]. 2023 Nov. 30 [cited 2026 Sep. 27];11(9):48-54. Available from: https://oip-journal.org/index.php/oip/article/view/245