Pengaruh Model Pembelajaran Problem Based Learning Terhadap Kemampuan Pemecahan Masalah Matematis Peserta Didik Kelas IX SMP IT Darul Hikmah Pasaman Barat Fadhil, Azmil FMIPA UNP Rani, Maulani Meutia Fauzan, Ahmad Sari, Shinta thesis https://repository.unp.ac.id/id/eprint/45779/ https://repository.unp.ac.id/id/eprint/45779/1/final_2_AZMIL_FADHIL_20029112_8796_2025.pdf open access 2025 MODEL PEMBELAJARAN PROBLEM BASED LEARNING