Golden ratio and Fibonacci series are mathmatically related.
The 'series' of Fibonacci is arrived at by starting with 0, 1 and adding them to produce the next number....0+1=1 .....Now, add the last 2 numbers AGAIN to produce the 4th number....1+1=2.
And so on.
By the time you get to 21 and 13, you can begin dividing them to get Phi, the right name for the Golden Ratio or Section.
Cool number. Phi squared = itself +1 and the SqRt is itself -1.
As for the origin? goes way back, but the Great Pyramid of about 4500BCE is made with that ratio. Pinga may have learned about it in Egypt as Pythagoras learned some 'sacred geometry' there, as well.
The 'series' of Fibonacci is arrived at by starting with 0, 1 and adding them to produce the next number....0+1=1 .....Now, add the last 2 numbers AGAIN to produce the 4th number....1+1=2.
And so on.
By the time you get to 21 and 13, you can begin dividing them to get Phi, the right name for the Golden Ratio or Section.
Cool number. Phi squared = itself +1 and the SqRt is itself -1.
As for the origin? goes way back, but the Great Pyramid of about 4500BCE is made with that ratio. Pinga may have learned about it in Egypt as Pythagoras learned some 'sacred geometry' there, as well.