Step by step construction of a golden oval.[br]Click the arrow buttons displayed at the bottom of the window or click the [i]Play[/i] button to play the construction automatically.[br]When the construction is finished, drag point [i]A[/i] and observe how its axes ratio is always equal to the golden number [math]\Phi[/math][br][url=https://tube.geogebra.org/student/m672901] Italian version[/url]