1.6Build a major chord from geometry

Take C.

A major triad is:

root + major 3rd + perfect 5th

So:

C + 4 semitones = E

C + 7 semitones = G

Therefore:

C major = C E G

= до ми соль

Now do the same from D:

D + 4 = F♯

D + 7 = A

So:

D major = D F♯ A

= ре фа-диез ля

Notice: we did not memorize D major separately. We used a formula.

That is how I want you to think increasingly often.