AL-OSSMI, Laith H. M. The high-accuracy geometric approximation of the ellipse’s perimeter by the measuring right-angled triangle. Alifmatika: Jurnal Pendidikan dan Pembelajaran Matematika, [S. l.], v. 7, n. 2, p. 310–331, 2025. DOI: 10.35316/alifmatika.2025.v7i2.310-331. Disponível em: https://journal.ibrahimy.ac.id/index.php/Alifmatika/article/view/7772. Acesso em: 22 jan. 2026.