Combining chords from relative keys

1. Do relative keys have the same chords?
2. How do you use chords from other keys?
3. Do relative keys share the same key signature?

Do relative keys have the same chords?

Relative scales are major and minor scales that share the same notes and chords, and therefore the same key signature. Every major scale has a relative minor scale and every minor scale has a relative major scale.

How do you use chords from other keys?

When we notate borrowed chords derived from the parallel minor key, we use the same symbols as the natural minor. However, if the root is altered, we must add a flat on the left side of the symbol. We can write them as below: i, ii°, ♭III, iv, v, ♭VI, ♭VII.

Do relative keys share the same key signature?

In music, relative keys are the major and minor scales that have the same key signatures (enharmonically equivalent), meaning that they share all the same notes but are arranged in a different order of whole steps and half steps.