Uyun, Qurrotul, Iis Holisin, and Febriana Kristanti. “Pengembangan Media Handout Segitiga Dengan Model Problem Based Instruction”. MUST: Journal of Mathematics Education, Science and Technology 2, no. 1 (April 25, 2017): 115–128. Accessed February 23, 2026. https://journal.um-surabaya.ac.id/matematika/article/view/546.