3,4,5 All-Squared Day, 9/16/25

Edition commemorating 2025's "3,4,5 All-Squared Day" – 9/16/25 – on which the date corresponded to the Pythagorean theorem applied to a 3,4,5 right triangle (3² + 4² = 9 + 16 = 25 = 5²). I hope your day was all-right! QED. [Image references the core mathematical element from the day's "45 squared" art edition.]