CABALLERO SANDOVAL, Edinson Armando. Pedagogical strategies based on challenge-based learning for the appropriation of geometric concepts in ninth grade students. Mundo FESC Journal, [S. l.], v. 16, n. 34, 2026. DOI: 10.61799/2216-0388.2138. Disponível em: https://www.fesc.edu.co/Revistas/OJS/index.php/mundofesc/article/view/2138. Acesso em: 27 may. 2026.