Lecture
This lecture covers the transition from 2D to 3D geometry, focusing on equivalent shapes, conical sections, spatial curves, and duplication of the cube using parabolas and hyperbolas. It explores the concepts of conics in space, conical sections, and the construction of equivalent rectangles. The instructor discusses the eccentricity of parabolas, ellipses, and hyperbolas, as well as the geometric properties of right circular cones. Various exercises and geometric constructions are presented to deepen understanding.