diminished triads — 3 half steps, 3 half steps	Theory Things William Wieland
fa re ti line line line OR space space space g e c c a f d b g g e c c a f d b g e c a a f d b g e e c a a f d b g e f d b f d b f d b
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 Diminished Triad Difficulty – Level 2.