Manekat S, Son AL, Siahaan MML. An Analysis of Grade VIII Students’ Difficulties in Solving Circle Story Problems: A Study Based on Polya’s Problem-Solving Theory. Brillo J. [Internet]. 2025 Jun. 30 [cited 2025 Jul. 31];4(2):107-21. Available from: https://journal.sncopublishing.com/index.php/brillojournal/article/view/70