Math in Nature - Fibonacci

Fibonacci Sequence:

0,1,1,2,3,5,8,13,21,34,...

(add two adjacent terms to get the following term!)

There is a great website to see

Fibonacci Numbers in Nature:

http://britton.disted.camosun.bc.ca/fibslide/jbfibslide.htm

1) Is 13 really that unlucky?

2) Why do we consider 21 as ADULTHOOD?

3) Why do we use 3 by 5 cards for notes?

4) Is a 5 by 8 inch photo visually appealing to you?

5) The Mountain Laurel Blossom (found in the Smokies)

has the shape of a Pentagon! (5 sided)

Maybe SIGNS are not considered Nature,
but we find them in our world.
First let's review the names of polygons:

NOW A FEW SIGN EXAMPLES:

Below is the bottom of a stalk of CELERY.
(Check out the SYMMETRY!)

Fibonacci Numbers and Nature :

http://www.maths.surrey.ac.uk/hosted-sites/R.Knott/Fibonacci/fibnat.html

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