Descriptive Geometry: Ellipse Projections

This lecture covers the concept of ellipse projections, starting with the ellipse as an image of a circle through affinity transformations. Properties such as symmetry around the center, major and minor axes, and conjugate diameters are discussed. The construction of an ellipse by points and tangents is explained, along with the definition by axes and diameters. The lecture also explores the projection of a circle onto a plane, resulting in an ellipse, and the properties of the axes and conjugate diameters of the ellipse. Examples and practical constructions are provided to illustrate the theoretical concepts.