The Golden Section

The Golden Section is based on a ratio which results in phi

Take a line and divide it so that the ratio of the large piece (B) to the whole line (A) is the same as the ratio as the small piece (C) to the large piece (B):

So A is 161.8% of B and B is 161.8% of C.

This ratio has been used by mankind for centuries

Its use started as early as with the Egyptians in the design of the pyramids,

 

The Greeks knew it as the Golden Section	The Renaissance artists knew it as the Divine Proportion
and used it for beauty and balance in the design of architecture	and used it for beauty and balance in the design of art

It was used in the design of Notre Dame in Paris

and continues today in many examples of art, architecture and design.