Sabaniatun, S., Febrilia, B. R. A., & Juliangkary, E. (2019). The Problem Solving Ability of Students on the Material Perimeter and Area of a Triangle. Edumatica : Jurnal Pendidikan Matematika, 9(02), 1-13. https://doi.org/10.22437/edumatica.v9i02.6074