I think I found a small mistake on "Intro to Triads & Inversions: Lesson 4" page.
Shouldn't there be a word "minor" written instead of "C major chord" ?
Quote:
" C major chord:
C (1) - E-flat (3) - G (5) Played together this results in the triad of a C minor chord played in it's most basic form. Pitchwise, the lowest note is the root note, the C, the 1st scale degree, so this is our Root Position C minor chord because the notes are arranged low to high 1st, 3rd & 5th. "