Part 3 Chord of Contact Equation of Chord with Mid point (x1, y1): Equation of the Chord joining two Points on an Ellipse Diameter of the Ellipse Conjugate Diameter Properties of diameters: Properties of conjugate diameters: Equi-conjugate diameters: Subtangent and Subnormal Concyclic Points Reflection property of an Ellipse Some properties of ellipse: