This page is a sub-page of our page on Metric Geometry. /////// The sub-pages of this page are: • Geometrical Optics • Geometric Shapes • The Golden Section (a.k.a. “The Golden Ratio” or “The Golden Number”) • Lines in the plane and planes in 3D-space Swedish: • Linjer i planet och plan i 3D-rymden /////// … Continue reading Euclidean Geometry