Pradana M. THE ACTIVITY INFLUENCE USING GEOGEBRA PROGRAM ON CIRCLE SUBJECT OF STUDENT ACHIEVEMENT. UJMC (Unisda Journal of Mathematics and Computer Science) [Internet]. 1Jun.2015 [cited 4May2024];1(01):39-6. Available from: http://e-jurnal.unisda.ac.id/index.php/ujmc/article/view/435