Bayu CP, Yohanie DD, Handayani AD. Analysis of student errors in solving comparative trigonometry problems of right-angled triangles based on watson’s criteria. J. Math Educ. Nusant. Wahana Publ. Karya Tulis Ilm. di Bid. Pendidik. Mat. [Internet]. 2021Nov.25 [cited 2024Apr.19];7(2):161-7. Available from: https://ojs.unpkediri.ac.id/index.php/matematika/article/view/16247