THE EFFECT MODEL TO LEARN GUIDED DISCOVERY LEARNING ON THE RESULT STUDY OF MATHEMATIC IN STUDENTS CLASS VII SMP N 2 KEPENUHAN ON MATTER RECTANGLE AND TRIANGLE - -, Firdaus; Program Studi Pendidikan Matematika Fakultas Keguruan dan Ilmu Pendidikan Universitas Pasir Pengaraian (Universitas Pasir Pengaraian, 2015)