Zuzano, F. ., Musdi, E. ., & Lufri, L. (2025). Designing a Hypothetical Learning Trajectory with Open-Ended Tasks: An Approach to Teaching Angle Measurement. International Journal of Innovative Research and Scientific Studies, 8(3), 1563–1572. https://doi.org/10.53894/ijirss.v8i3.6837