If you look closely at these arpeggio/chord shapes and compare them to shape 3 of the major pentatonic scale, you’ll see the shared notes. It’s unlikely we’d come up with note groupings like ...

You don't need to know many guitar scales to ... Unlike chords, scales are played one note at a time. You should be able to ...

Major pentatonic scales are used a lot in folk music and Chinese music. They usually have a joyful feeling. They are also very good for solos and melodies played on the guitar.