Critical moment manifestations In perpendicular lines . Journal of the College of Basic Education, [S. l.], v. 26, n. 108, p. 448–458, 2022. DOI: 10.35950/cbej.v26i108.5286. Disponível em: https://cbej.uomustansiriyah.edu.iq/index.php/cbej/article/view/5286.. Acesso em: 3 jul. 2024.