Golden ratio

Golden ratio line

Golden section of AB segment; AS is the golden segment of AB (and thus SB, of AS)

Construction of segment from its given golden segment

Finding the golden section S of a segment AB

Construction of segment AB from its given golden segment AS

Golden rectangles

Ratio between adjacent Fibonacci numbers—as sides of the rectangles—approximates the golden ratio

Golden and silver triangles

Regular pentagram

A pentagram with golden ratios

A pentagram image illustrating the golden ratios hidden in it

Golden spiral in rectangles

Golden spiral in triangles

Approximate and true Golden Spirals.

Two golden rectangles in the (square root of natural numbers) diagram

Golden angle Ψ approximately equals to 137,5°

Phi digits

Leonardo da Vinci's Vitruvian Man

Leonardo da Vinci's Vitruvian Man