I love to "beat a dead horse"; it's how I apply new found knowledge.
Anyone care to spot check my "homework"?
Your chart is the same as my references.
Here is the algorithm - All Chords are Stacked thirds from the scale
A Major chord is a Maj 3rd interval followed by a Minor 3rd interval.
A minor chord is a Minor 3rd interval followed by a Major 3rd interval.
For example:
For a C Major chord, , select the root and go up a major 3rd (two full steps) to a E, then continue up a minor 3rd (one and a half steps) to a G and you get the C Major triad (C – E -G)
For a Cm chord, select the root and go up a minor 3rd (one and a half steps) to a Eb, then continue up a major 3rd (two full steps) to a G and you get the Cm triad (C – Eb -G)
This works for every Major or Minor chord in any Key!
If this now makes sense, congradulations you have just passed beginning Music Theory - 100. If you want to pass Music Theory 101, then you need to fully understand the next chart which combines the triads you have just learned with the harmonized scales for each individual key:

Oh, and by the way, if there are any typos above, these can always be corrected.
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