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Decimal numbers were in use in Europe well before the time of Fibonacci so he would have "related" to them when he started to count!
The Fibonacci sequence is a series of numbers in which each number is the sum of the two previous numbers. When graphed, the sequence creates a spiral. The sequence is also related to the "Golden Ratio." The Golden Ratio has been used to explain why certain shapes are more aesthetically pleasing than others.
Fibonacci was most famous for his contribution to mathematics, specifically the Fibonacci sequence. The Fibonacci Sequence is as follows: Start with the numbers 0 and 1, add them together you get 1, then add 1 and 1 together you get 2, then add 2 and 1 together you get 3 then add 3 and 2, 5, then 5 and 3, 8, then 8 and 5, 13 and soon below is all the Fibonacci numbers upto 233, 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233... In other words each number is a result of the two previous numbers added together. The significance of this is that the higher you get in the sequence, you can divide a number and its previous number and that will give you a number close to the golden ratio (a special number that is used very frequently in mathematics, usually designated by the letter "e"). Fibonacci, or Leonard of Piza, was perhaps the western world's most exalted mathematician of the middle ages. He is best known nowadays for the discovery of the Fibonacci Series -- a series that occurs throughout nature. In this series, every new number is the result of the sum of the previous two numbers. Like this: 1,1,2,3,5,8,13,21,34 ... Many things in nature are related to Fibonacci series. No. of petals in any flower is a Fibonacci no., No. of steps in a round stair-case is a Fibonacci no., etc
A few examples: Counting numbers are an arithmetic sequence. Radioactive decay, (uncontrolled) bacterial growth follow geometric sequences. The Fibonacci sequence is widespread in nature.
how can I show how numbers are related to each other