FEBRIYANTI, W.; WAHYUDDIN, W.; MUTMAINNAH, M. Analysis of Student Errors in Solving Problems on Three-Dimensional Shapes with Flat Surfaces: A Qualitative Study on Eighth-Grade Students . International Journal of Geometry Research and Inventions in Education , [S. l.], v. 1, n. 2, p. 58–65, 2024. DOI: 10.56855/gradient.v1i2.1198. Disponível em: https://journals.eduped.org/index.php/Gradient/article/view/1198. Acesso em: 17 oct. 2025.