Evektivitas Model Project Based Learning Berbantuan Multi-Platfrom Terhadap Kemampuan Spatial Dan Representasi - Is Soleha, Ruvatul Nida; Netriwati, Netriwati; Ambarwati, Riyama; Ayuni Suri, Indah Resti; Nendra, Fadly (Imajiner: Jurnal Matematika dan Pendidikan Matematika, 2026)