# Fibonacci Numbers In Nature Essays

## Fibonacci Numbers Essay

Its a good essay, for a Math project. Well don, although you could have had more specific examples.

The Fibonacci numbers were first discovered by a man named Leonardo

Pisano. He was known by his nickname, Fibonacci. The Fibonacci sequence is a

sequence in which each term is the sum of the 2 numbers preceding it. The first 10

Fibonacci numbers are: (1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89). These numbers are

obviously recursive.

Fibonacci was born around 1170 in Italy, and he died around 1240 in Italy.

He played an important role in reviving ancient mathematics and made significant

contributions of his own. Even though he was born in Italy he was educated in

North Africa where his father held a diplomatic post. He did a lot of traveling with

his father. He published a book called Liber abaci, in 1202, after his return to Italy.

This book was the first time the Fibonacci numbers had been discussed. It was

based on bits of Arithmetic and Algebra that Fibonacci had accumulated during his

travels with his father. Liber abaci introduced the Hindu-Arabic place-valued

decimal system and the use of Arabic numerals into Europe. This book, though,

was somewhat contraversial because it contradicted and even proved some of the

foremost Roman and Grecian Mathematicians of the time to be false. He published

many famous mathematical books. Some of them were Practica geometriae in

1220 and Liber quadratorum in 1225.

The Fibonacci sequence is also used in the Pascal trianle.

The sum of each diagnal row is a

fibonacci number. They are also in the right sequence: 1,1,2,5,8.........

Fibonacci sequence has been a big factor in many patterns of things in nature.

One has found that the fractions u/v representing the screw-like arrangement of

leaves quite often are members of the fibonacci sequence. On many plants, the

number of petals is a...

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### The Golden Ratio Essay

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Fibonacci Numbers

The Fibonacci numbers were first discovered by a man named Leonardo

Pisano. He was known by his nickname, Fibonacci. The Fibonacci sequence is a

sequence in which each term is the sum of the 2 numbers preceding it. The first

10 Fibonacci numbers are: (1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89). These numbers

are obviously recursive.

Fibonacci was born around 1170 in Italy, and he died around 1240 in

Italy. He played an important role in reviving ancient mathematics and made

significant contributions of his own. Even though he was born in Italy he was

educated in North Africa where his father held a diplomatic post. He did a lot

of traveling with his father. He published a book called Liber abaci, in 1202,

after his return to Italy. This book was the first time the Fibonacci numbers

had been discussed. It was based on bits of Arithmetic and Algebra that

Fibonacci had accumulated during his travels with his father. Liber abaci

introduced the Hindu-Arabic place-valued decimal system and the use of Arabic

numerals into Europe. This book, though, was somewhat contraversial because it

contradicted and even proved some of the foremost Roman and Grecian

Mathematicians of the time to be false. He published many famous mathematical

books. Some of them were Practica geometriae in 1220 and Liber quadratorum in

1225.

The Fibonacci sequence is also used in the Pascal trianle. The sum of

each diagnal row is a fibonacci number. They are also in the right sequence:

1,1,2,5,8.........

Fibonacci sequence has been a big factor in many patterns of things in

nature. One has found that the fractions u/v representing the screw-like

arrangement of leaves quite often are members of the fibonacci sequence. On many

plants, the number of petals is a Fibonacci number: buttercups have 5 petals;

lilies and iris have 3 petals; some delphiniums have 8; corn marigolds have 13

petals; some asters have 21 whereas daisies can be found with 34, 55 or even 89

petals. Fibonacci nmbers are also used with animals. The first problem Fibonacci

had wehn using the Fibonacci numbers was trying to figure out was how fast

rabbits could breed in ideal circumstances. Using the sequence he was ale to

approximate the answer.

The Fibonacci numbers can also be found in many other patterns. The diagram

below is what is known as the Fibonacci spiral. We can make another picture

showing the Fibonacci numbers 1,1,2,3,5,8,13,21,.. if we start with two small

squares of size 1, one on top of the other. Now on the right of these draw a

square of size 2 (=1+1). We can now draw a square on top of these, which has

sides 3 units long, and another on the left of the picture which as side 5. We

can continue adding squares around the picture, each new square having a side

which is as long as the sum of the latest two squares drawn.

If we take the ratio of two successive numbers in Fibonacci's series, (1 1 2 3 5

8 1 3..) we find:

1/1=1; 2/1=2; 3/2=1.5; 5/3=1.666...; 8/5=1.6; 13/8=1.625;

It is easier to see what is happening if we plot the ratios on a graph:

Greeks called the golden ratio and has the value 1.61803. It has some

interesting properties, for instance, to square it, you just add 1. To take its

reciprocal, you just subtract 1. This means all its powers are just whole

multiples of itself plus another whole integer (and guess what these whole

integers are? Yes! The Fibonacci numbers again!) Fibonacci numbers are a big

factor in Math, The Golden Ratio, The Pascal Triangle, the production of many

species, plants, and much much more.

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