widada wahyu. THE EXISTENCE OF STUDENTS IN TRANS EXTENDED COGNITIVE DEVELOPMENT ON LEARNING OF GRAPH THEORY*). J. Math Educ. Nusant. Wahana Publ. Karya Tulis Ilm. di Bid. Pendidik. Mat. [Internet]. 2015May25 [cited 2024Dec.5];1(1). Available from: https://ojs.unpkediri.ac.id/index.php/matematika/article/view/119