There is also a unique right triangle whose angles are in a geometric progression. The three angles are π/(2*φ*^{2}), π/(2*φ*), π/2 where the common ratio is *φ*, the golden ratio.^{ }Consequently the angles are in the ratio

Phi( *φ) is calculated as a/b where a and b are the non hypotenuse sides of the triangle*

*φ = a+b/a = a/b*