KUZ’MICH, Valeriy; KUZMICH, L.; SAVCHENKO, O. FORMATION OF THE CONCEPT OF ANGLE BY MEANS OF METRIC GEOMETRY ON GEOMETRIC MATERIAL OF 9TH GRADE. Physical and Mathematical Education, Україна, v. 29, n. 3, p. 6–12, 2021. DOI: 10.31110/2413-1571-2021-029-3-001. Disponível em: https://www.fmo-journal.org/index.php/fmo/article/view/74. Acesso em: 6 jun. 2026.