The Dm chord is constructed from the D major scale. Using the previous chord formula on the D major scale as follows, it can be seen that the Dm chord contains the notes D, F and A. When the third note of the D major scale (F#) is flattened, it becomes an F note.
Play the three notes of the Dm chord with the first, third, and fifth fingers of your right hand, individually, and then together, as shown here.