Manekat, Septianingsi, Aloisius Loka Son, and Meiva Marthaulina Lestari Siahaan. “An Analysis of Grade VIII Students’ Difficulties in Solving Circle Story Problems: A Study Based on Polya’s Problem-Solving Theory”. Brillo Journal 4, no. 2 (June 30, 2025): 107–121. Accessed July 31, 2025. https://journal.sncopublishing.com/index.php/brillojournal/article/view/70.