  We study the role of colliding geometry on the N/Z dependence of balance
energy using isospin-dependent quantum molecular dynamics model. Our study
reveals that the N/Z dependence of balance energy becomes much steeper for
peripheral collisions as compared to the central collisions. We also study the
effect of system mass on the impact parameter dependence of N/Z dependence of
balance energy. The study shows that lighter systems shows greater sensitivity
to colliding geometry towards the N/Z dependence.
