Golden triangle (mathematics)

Golden gnomon, having side lengths 1, 1, and $\phi$ .

A golden triangle, also called a sublime triangle,^[1] is an isosceles triangle in which the duplicated side is in the golden ratio $\varphi$ to the base side:

{a \over b}=\varphi ={1+{\sqrt {5}} \over 2}\approx 1.618034~.

^ Elam, Kimberly (2001). Geometry of Design. New York: Princeton Architectural Press. ISBN 1-56898-249-6.

[elam-1] Elam, Kimberly (2001). Geometry of Design. New York: Princeton Architectural Press. ISBN 1-56898-249-6.

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