A) The Angles of 1:2:√5 Triangle in terms of Golden Ratio, (B

Solution, Using angles in a pentagon, Trigonometry: Compound Angles

Golden Quadrilaterals

geometry - Is the angle of the 345 triangle (pythagorean triple) related to the Geometric Progression. 4, 2, 1, 1/2, 1/4? - Mathematics Stack Exchange

Golden ratio - Wikipedia

Fibonacci and Golden Ratio

If the golden ratio exists in a lot of forms in the universe, why isn't it in any equation? - Quora

The Golden Geometry of Incenter and Excenters of the 1:2:√5 triangle.

PDF) Golden Ratio and other Metallic Means ; The Geometric Substantiation of all Metallic Ratios with Right Triangles

All angles in terms of Golden Ratio.

geometry - New very simple golden ratio construction incorporating a triangle, square, and pentagon all with sides of equal length. Is there any prior art? - Mathematics Stack Exchange

PDF) Golden Ratio and other Metallic Means ; The Geometric Substantiation of all Metallic Ratios with Right Triangles

Solution, Using angles in a pentagon, Trigonometry: Compound Angles

Why is the solution to X - 1 = 1/X the golden ratio? - Quora