6.53
FIBONACCI
SERIES
Nikhil D Patel

WHAT IS FIBONACCI SERIES?
2
 The Fibonacci sequence is a series of
numbers that follow a unique integer
sequence.
 These numbers generate
mathematical patterns that can be
found in all aspects of life.
 The patterns can be seen in
everything from the human body to
the physiology of plants and animals.

HOW DOES THE FIBONACCI
SEQUENCE WORK ?
3
 The Fibonacci sequence is derived from the Fibonacci numbers. The Fibonacci
numbers are as follows:
0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144 ... and so on.
These numbers are obtained by adding the two previous numbers in the
sequence to obtain the next higher number.
Example: 1+1= 2, 2+3= 5, 5+8= 13 ...
 The formula is: Fn = Fn-1 + Fn-2
 Every third number is even and the difference between each number is .618
with the reciprocal of 1.618.
 These numbers are know as the "golden ratio" or "golden mean."

WHAT IS THE HISTORY OF THE
FIBONACCI SEQUENCE?
4
 The exact origination of the Fibonacci sequence is
unknown.
 It is believed that contributions to the theory began
in 200 BC by Indian mathematicians whose studies
were based on Sanskrit prosody.
 The sequence was introduced to Western European
mathematics in 1202 by Leonardo of Pisa, aka
"Fibonacci"
 His study of the sequence began with the breeding
patterns of rabbits. In which he found rabbit
generations duplicated in accordance with the
Fibonacci numbers.

FIBONACCI IN NATURE
5
Patterns created by the Fibonacci
sequence can be found throughout nature.

FIBONACCI IN PETALS
6
The Fibonacci sequence can be seen in most petal patterns.
For instance most daisies have 21,34, 55 or 89 petals. (The 9th, 10th, and 11th Fibonacci numbers)

FIBONACCI SEQUENCE IN SUNFLOWER
7
The Fibonacci sequence can be found in a
sunflower heads seed arrangement.
The arrangement of seed is based upon the
golden mean which corresponds to the "golden
angle" of 137 .5 degrees.
The seeds are arranged in consistent patterns
of 137.5 degrees
This gives the flower the optimal filling ratio
for its seeds

FIBONACCI SEQUENCE IN SEASHELLS
8
The Fibonacci numbers directly correspond to
the spiral found in seashells.
The numbers form what are called Fibonacci
rectangles or "golden rectangles"
The rectangles are unique because each
rectangle has sides equal to the length of the
Fibonacci numbers.
Within these rectangles we can create a spiral
with cross sections equal to exactly 1.618 (the
"golden mean" with the corresponding angle of
137 .5 degrees

THANK YOU