Those positions illustrate all of the notes in that scale in that position. The pentatonic scale is 5 of those notes at a time by definition. I am no expert at all but finally starting to learn that although it is good to know the shapes because it provides the visual backdrop but it is far more important to know the roots and intervals.
So to answer you more specifically, to literally play the pentatonic scale you would start on the root and play 5 notes which would leave you one interval away from the root.
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