How can the fermi temperature of a fermi gas tell us about if it is degenerate or not?

Question

I know that If $T≪TF$ then the gas can be considered completely degenerate. If $T∼TF$ then the gas is partially degenerate. If $T>TF$ then the gas is not degenerate. But I don't know how we can tell the degeneracy of a fermion gas by comparing it's temperature with the fermi temperature of that fermion gas.