Six-Four Chords (Second Inversion triads) — only 4!					Theory Things William Wieland
I will ask you to play these from memory. Memorize the four names, the pitches and the Roman numerals with figures.
Cadential Six-Four		Pedal Six-Four		Arpeggiated 6-4		Passing Six-Four
The only six-four chord that appears on a strong beat.		a.k.a. neighboring, stationary, or embellishing six-four		The bass is an arpeggio. It may also descend.		The bass moves by step. It may also descend.
C:  I 6 4 V I
Examples in real music
Swing low, sweet chariot.