Nine is also imp in this....................9 is the last single digit number...................9 is also the 6th number in pi..........imp. b/c 6 is the 1st perfect number.....................also..........9 + 6 = 15...........as in the 1st 5 primes...........connects single digits to double digits..................like 1/2.......the critical line............1 for single digits, 2 for double digits.................2, 3, 5, 7, 11...............whose sum is 28...........imp. b/c it is the 2nd perfect number....................and when the its single digits are added to its double digits..............it sums to 10...........like the base 10 number system............2 + 8 = 10.................2 - 11.............also features the 1st 5 non primes.............4, 6, 8, 9, 10.......which connects single digits to double digits..............................and whose sum.........37..........sums to 10...........3 + 7 = 10...........................and a 4 and a 1............four numbers in single digits and one in double digits.............much like 14i........

Pi (π)

Draw a circle with a diameter (all the way across the circle) of 1
Then the circumference (all the way around the circle) is 3.14159265... a number known as Pi

Pi is often written using the greek symbol π