AREA OF A PARALLELOGRAM AND DIFFERENCE FORMULA. Far East Journal of Mathematical Education, [S. l.], v. 27, n. 2, p. 139–140, 2025. DOI: 10.17654/0973563125016. Disponível em: https://pphmjopenaccess.com/fejme/article/view/3771. Acesso em: 5 jan. 2026.