Which one is preferable in academic English writing?

There are tables and figures in a document, uniquely identifiable by their numbers. 

We want to refer to them in several places. Is the definite articel used or not? Which one sounds better and why?

    In figure 1 ...
    In the figure 1 ...

    With the help of table 1 ... 
    With the help of the table 1 ...

    Lemma 1 helps ...
    The lemma 1 helps ...