Lady Agustina, , Cholis Sa’dijah , Sukoriyanto , Tjang Daniel Candra 2022. Students’ Mental Model in Understanding Quadrilateral Concept. Turkish Journal of Computer and Mathematics Education (TURCOMAT). 13, 2 (May 2022), 1062–1069. DOI:https://doi.org/10.17762/turcomat.v13i2.12676.