Zahra, L., and N. Nalim. “THE EFFECTIVENESS OF THE PROBLEM-BASED LEARNING MODEL ON FLAT-SIDED GEOMETRICS MATERIAL ON STUDENTS CRITICAL THINKING ABILITIES AT SMPN 1 KAJEN”. AB-JME: Al-Bahjah Journal of Mathematics Education, vol. 2, no. 1, July 2024, pp. 163-71, doi:10.61553/abjme.v2i1.151.