Learn Hardcore Danish: Vores chef viser en præsentation på whiteboardet i mødelokalet. - Our boss shows a presentation on the whiteboard in the meeting room.

You may also see vor, vort, and vore, but those are more formal, literary, old-fashioned, or stylistically marked. In everyday Danish, vores is the usual choice regardless of the gender or number of the noun that follows.

So:

vores chef = our boss
vores bil = our car
vores børn = our children

Why does it say en præsentation?

Because præsentation is a common-gender noun in Danish, so its indefinite singular article is en.

The basic form is:

en præsentation = a presentation

If it were definite, it would usually be:

præsentationen = the presentation

In this sentence, en præsentation is indefinite, so it means the speaker is referring to a presentation, not a specific one already identified as the presentation.

What form is viser, and why does it end in -r?