Karina, Nadila, and Muhammad Yani. “PENERAPAN MODEL PEMBELAJARAN PROBLEM BASED LEARNING PADA MATERI GEOMETRI DI SMP/MTs”. Jurnal Ilmiah Pendidikan Matematika Al Qalasadi 4, no. 2 (December 30, 2020): 142-150. Accessed April 21, 2026. https://dev-journal.iainlangsa.ac.id/index.php/qalasadi/article/view/2217.