Tadayra n Beṭṭiwa d tadayra deg tmurt n Lezzayer, tettiki deg twilayt n Wehran. Ma d tajumma-ines tesɛa azal n 197,01 km². Tamanaɣt ines d tamdint n beṭṭiwa. Tadayra-a tebḍa ɣef 3 n tɣiwanin: BeṭṭiwaƐin LbeyyaMarsat El Hadjadj (fr)