Conics

Conic Section on Five Points

Conic Section on Five Lines

Conic Section on Four Points and One Line

Conic Section on Three Points and Two Lines

Conic Section on One Point and Four Lines

Conic Determined by Two Points and Three Lines

Maximum Area of an Ellipse Inscribed in a Quadrilateral

Results from a YouTube Video

Desargues Involution Theorem

Focus-Directrix Definition of a Conic

Focus-Directrix Right Angle Property

Distance Property of an Ellipse

Distance Property of a Hyperbola

Conic Generated by a Point and a Circle

Reflective Property of a Parabola

Reflective Property of an Ellipse

Reflective Property of a Hyperbola

Orthoptic of a Parabola

Orthoptic of an Ellipse

Orthoptic of a Hyperbola

Tangent to a Parabola

Tangent to an Ellipse

Tangent to a Hyperbola

Tangent to a Hyperbola - Midpoint Property

Three Tangents to a Parabola

Chord Subtends Right Angle in a Parabola

Shawyer's Hyperbola

Two Tangents to a Parabola

Rectangular Hyperbola

Equilateral Triangle Inscribed in Parabola

Equilateral Triangle Circumscribing a Parabola

Equilateral Triangle and a Rectangular Hyperbola

Two Parallel Tangents to an Ellipse

Two Tangent Parabolas

Two Tangent Ellipses

Elliptic Gears

A Problem on a Normal to an Ellipse

Pascal's Theorem - Parabola

Pascal's Theorem - Ellipse

Pascal's Theorem - Hyperbola

Brianchon's Theorem - Parabola

Brianchon's Theorem - Ellipse

Brianchon's Theorem - Hyperbola

Pole-Polar Duality - Parabola

Pole-Polar Duality - Ellipse

Pole-Polar Duality - Hyperbola

Nine-Point Conic

Locus of Center of Conic Determined by Four Points

Fregier's Theorem - Parabola

Fregier's Theorem - Ellipse

Fregier's Theorem - Hyperbola

Focal Chord of a Parabola

Focal Chord of a Ellipse

Focal Chord of a Hyperbola

Focal Chords of a Parabola

Focal Chords of an Ellipse

Focal Chords of a Hyperbola

Poncelet's Theorem - Quadrilateral

Poncelet's Theorem - Triangle and Ellipse

Poncelet's Theorem - Ellipse and Rhombus

Poncelet's Theorem - Hyperbola and Rhombus

Poncelet's Theorem - Parabola

Poncelet's Theorem - Ellipse

Poncelet's Theorem - Hyperbola

Parabola Tangent to Axes

Locus of Triangle Centers from a Straight Line

Conic by Perpendicular Bisector

Foci of a General Conic

Butterfly from Desargues

Equilateral Triangle Circumscribing an Ellipse

Equilateral Triangle Inscribed in an Ellipse

Generalization of a Fixed Point Property

Group Structure on a Conic

Group Structure on a Conic and Line

Inconic of a Triangle by Focus

Inconic of a Triangle by Perspector

Inconic of a Triangle by Center

Circumconic of a Triangle by Center

Circumconic of a Triangle by Perspector

Parabola as an Envelope

Intersection of Two Parabolas

Normals to a Parabola

Kasner's Theorem

Inscribed Parabola of a Triangle

Circumscribed Parabola of a Triangle

Rectangular Hyperbola of a Triangle