Major Triad Look-alikes   (Treble Clef) Introduction to Chords (musictheory.net) Theory Things   William Wieland
Practice with Chord Construction (musictheory.net) — Click on the gear in the upper right to customize as follows:
Clefs – Treble & Bass, Key Signatures – only the top one, Chords – only Major Triad, Difficulty – Level 2.


Major Triad Look-alikes   (Bass Clef)