Nupus, O.V., Armiati, A. and Arnawa, I.M. 2022. Hypothetical Learning Trajectory Design of Sinus Rules Based on PBL with Ethnomathematics of Minangkabau Culture. Jurnal Gantang. 7, 1 (Aug. 2022), 83–90. DOI:https://doi.org/10.31629/jg.v7i1.4474.