noun

geometrya rectangle whose width divided by height is equal to the golden ratio
The golden rectangle is a rectangle whose width divided by height is equal to the golden ratio (phi), where . The rectangle can be constructed using a compass and straight edge^{[1]}.
The golden ratio, often denoted as φ (phi), is an irrational number that has unique mathematical properties and appears in art, nature and, architecture. It is approximately equal to 1.61803398875.

Construct Golden Rectangle Example