EFFECTIVE METHODS FOR TEACHING THE PERIMETER OF TRIANGLES AND QUADRANGLES IN MATHEMATICS LESSONS. Modern American Journal of Linguistics, Education, and Pedagogy, [S. l.], v. 2, n. 4, p. 135–138, 2026. Disponível em: https://usajournals.org/index.php/6/article/view/2223. Acesso em: 1 may. 2026.