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. 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 ...