Ellipse: Controlling Size via Vertices and Foci

2013-06-10 01:46
This GeoGebra example demonstrates the geometric construction of an ellipse. By dragging two vertices A and B, users can dynamically control the size and shape of the ellipse. The construction includes the two foci F₁ and F₂, along with the first axis (major axis) and second axis (minor axis). This interactive example visually illustrates the fundamental elements of an ellipse — vertices, foci, an