# The Golden Ratio (phi)

by
**mpyleong**

Last updated 7 years ago

** Discipline: **

Math ** Subject: **

Patterns

The golden ratio (symbolized by the Greek letter "phi") is a special number approximately equal to 1.618034.THE IDEA BEHIND ITIf you divide a line into two parts so that the longer part divided by the smaller part is also equal to the whole length divided by the longer part, then you will have the golden ratio.Media Spotlight: The Golden Ratio

the

golden

ratio

• More on the golden ratio • Fibonnaci numbers • 15 uncanny examples...in nature • Puzzles and games

(1.61803398874989484820...)

ON THE LIBRARY SHELFFamous Problems and Their Mathematicians by Art Johnson (510 JOH)The Adventures of Penrose: the Mathematical Cat by Theoni Pappas (513 PAP)

KEY WORDSgolden ratiogolden sectiongolden meangolden rectangledivine proportion

It appears many times in

architecture and other areas.

music, nature, geometry, art,

This is known as the Fibonnaci sequence...

ON THE WWWEB

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