Video+activity+2

**Video 2: "The Golden Mean" (week 8)**

 * Pre-listening:**

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b. What's the connection between the golden mean and mathematics? I think that relationship is the existence of "Phi", which has been used for the construction of various mathematical forms like, spirals, rectangles and so on. It has also helped in the construction of certain structures, since the ancient times until today. =====

- Length

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Image taken from: []

Please click on the following link watch the video and then answer the following questions.
 * II. While viewing and after viewing**

1. **What's the process to construct the Fibonacci numbers?** To construct Fibonacci numbers you must __do__: ** omit ** First: Calculated zero plus one equal one, (0+1=1).

Second: Calculate one plus one equal 2, (1+1=2).

Third: Take the second number of the last equation and plus it with the result of the last equation (1+2=3).

Forth: Continue the process. For example:

0+1=1 1+1=2 1+2=3 2+3=5 3+5=8 5+8=13

Etc...

2. Why are many things designed using the Fibonacci rectangle and spiral?
I guess that it is used because, the things that were did it using this ratio, results very attractive for the human eye.

3. Mention some examples of the Fibonacci spiral in the world around us and inside us.
Some things may be the iPods, sea shells flowers, DNA, music.

4. In your opinion what are the applications of the Fibonacci theories?
I think that ** it ** is very useful because it let ** s ** us apply a special proportion to our things to make __it__ ** them ** rentable and beautiful. For example: __The using__ ** The use ** of ** the ** golden ratio in the research of DNA ha__d__ ** has ** done that research more rentable, because the length of DNA delimited with this ratio, contains the information to explain the formation of life.