Oh! DUH DUH DUH I got it. 360/10 = 36. 90/10 = 9. When you *add*
  the angles up via their single digits, the tens place 0
  disappears, turning the 360 into 36... and the 90 into 9...
  *ugh* no, no no, lol i'm getting sucked in again :P "