By A Mystery Man Writer
Exact Trig Values
Symmetry, Free Full-Text
The Golden Geometry of Incenter and Excenters of the 1:2:√5 triangle.
The Centroid Of The Triangle (Powerful Geometry Tricks To Score 100%) - Logicxonomy
PDF) Metallic Means and Right Triangles: The Geometric Substantiation of all Metallic Ratios
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
Geometry and the Golden section
30-60-90 Triangle - Rules, Formula, Theorem, Sides, Examples