We deal with two-sided complete hypersurfaces immersed in a Riemannian product
space, whose base is assumed to have sectional curvature bounded from
below. In this setting, we obtain sufficient conditions which assure that such a
hypersurface is a slice of the ambient space, provided that its angle function
has some suitable behavior. Furthermore, we establish a natural relation
between our results and the classical problem of describing the geometry of a
hypersurface immersed in the Euclidean space through the behavior of its Gauss
map.