Effect of Multimedia Teaching to the Achievement of Junior High School Students in Trigonometry. JPAIR Institutional Research, [S. l.], v. 3, n. 1, p. 69–79, 2014. DOI: 10.7719/irj.v3i1.289. Disponível em: https://philair.ph/index.php/irj/article/view/289. Acesso em: 21 nov. 2024.