Saputra H, Maimunah, Yuanita P. Development of Learning Instruments Based on The Problem Based Learning Model to Facilitate Students’ Mathematical Problem Solving Skill on Curved 3D Shapes. JA [Internet]. 2024 Apr. 30 [cited 2025 Apr. 11];6(2):1006-21. Available from: https://journal.upp.ac.id/index.php/absis/article/view/2381