Robertus Daya. (2023). ANALYSIS OF ABILITY IN UNDERSTANDING MATHEMATICS CONCEPTS ON THE CIRCULAR MATERIAL OF STUDENTS OF CLASS VIII OF SMP NEGERI 2 BAY IN THE 2020/2021 STUDY YEAR. Afore : Jurnal Pendidikan Matematika, 1(2), 78-87. https://doi.org/10.57094/afore.v1i2.725