LUMBANTOBING, Happy. The Effect of Interactive Computer Program on Student Accomplishment in Teaching Trigonometry. International Journal of Sciences: Basic and Applied Research (IJSBAR), Jordan, v. 42, n. 3, p. 38–48, 2018. Disponível em: https://www.gssrr.org/JournalOfBasicAndApplied/article/view/9393. Acesso em: 19 sep. 2025.