Hartono, H., Khaeriyah, D. Z., Sari, D. L., Ilfiana, M., & Nursyahidah, F. (2021). DEVELOPMENT OF LEARNING TRAJECTORY ON THE SET TOPIC FOR 7TH GRADE IN THE CONTEXT OF SEDEKAH LAUT TRADITION . Kalamatika: Jurnal Pendidikan Matematika, 6(2), 181-194. https://doi.org/10.22236/KALAMATIKA.vol6no2.2021pp181-194