9 also seems imp..........a right triangle is so called b/c its biggest angle is 90 degrees..................4 90 degree angles......form the 4 quadrants of the C plane......

Also.....and again..........there are 16 squares..........inside the 2 square.........with sides of 1/2...........1/2....the location of the so called Critical line...................there is another..........in the neg numbers........along the X axis....................every other neg interger................like 2pi.......full circle........every other one............2.........like the 2 square........like set theory.......the 2 square is the smallest square to inscribe the unit circle........the unit circle........called so b/c its radius is 1.............a circle of r = 1......a square with sides of 2.........a 1 and a 2......like 1/2........the critical line.............

If u make smaller squares...........inside the 2 square.....like I did below.........there are 16 of them....with sides of 1/2.......like the critical line...............16..........like the gold ratio..which starts out.....1.6....................