The Golden Number or Ratio is considered as the most beautiful ratio in art and architecture for centuries. From the Parthenon to Salvador Dali’s The Sacrament of the Last Supper the Golden Ratio has been found in some of the world’s most celebrated creations.
Represented by the greek letter phi (φ), the Golden Ratio is the irrational value: φ=1.61803. In order to find the φ we can have a line segment and divide it into two smaller segments such that the ratio of the whole line segment (a+b) to segment a is the same as the ratio of segment a to segment b, like this
or using algebric form 
.
The geometrical representation of this is the golden rectangle which looks like this
Our team tried to find some of the most known art works that are created by using the φ ratio. The result is this video:
https://www.slideshare.net/secret/vLOa769fZnqJlf
and some more examples
https://drive.google.com/drive/folders/1t_iK5oVn6x8IuzSeCBrw1RTU__0bhsew?usp=sharing
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