E|--3--7--10--      (G-B-D)

E|--7--11--14--     (B-D#-F#)

(G-B-D)   = Gmaj = root -> major 3 -> perfect 5
(F#-B-D#) = Bmaj = perfect 5 -> root -> major 3

(G-B-D)   = Gmaj = root -> major 3 -> perfect 5
(B-D#-F#) = Bmaj = root -> major 3 -> perfect 5