AFIF NORMA LIDYA; ENDANG ISTIKOMAH. Powtoon-Based Mathematics Learning Media: Validation Stage of the Pythagorean Theorem. Mathematics Research and Education Journal, [S. l.], v. 5, n. 1, 2025. DOI: 10.25299/mrej.2021.vol5(1).9153. Disponível em: https://journal.uir.ac.id/index.php/JPM/article/view/9153. Acesso em: 21 jul. 2026.