# Tiling squares with L-Trominoes

Is there a simple proof that any square besides a 3x3 square with area divisible by 3 is tileable with L-trominos?

• All such squares have an edge length which is a aum of 6es and 9s, so it suffices to exhibit tilings of the $6\times6$ and the $9\times 9$ squares. – MJD Aug 28 '14 at 23:30
• ... and of the $9 \times 6$ rectangle. – Robert Israel Aug 28 '14 at 23:38