06 - Equations & Definition of Conic Sections - Circle, Ellipse, Parabola & Hyperbola

View more at http://MathAndScience.com In this lesson, we will examine the geometric definition of the conic sections. We will discuss the geometric relations between ellipses, circles, parabolas, and hyperbolas. We will determine what the focus of the a conic sections is, and how the sum of focal radii determine the shape of the conic section. These definitions will be used to derive the equations of the conic sections.