Brianchon's Theorem

The Dual of Pascal's Theorem. It states that, given a 6-sided PolygonCircumscribed on a Conic Section, the lines joining opposite Vertices(Diagonals) meet in a single point.

References

Coxeter, H. S. M. and Greitzer, S. L. Geometry Revisited. Washington, DC: Math. Assoc. Amer., pp. 77-79, 1967.

Ogilvy, C. S. Excursions in Geometry. New York: Dover, p. 110, 1990.

• p-Good Path
• p-Group
• Phase
• Phase Space
• Phase Transition
• Phasor
• Phi Curve
• Phi Number System
• Phragmén-Lindêlöf Theorem
• Phyllotaxis
• Pi
• Piano Mover's Problem
• Picard's Existence Theorem
• Picard's Little Theorem
• Picard's Theorem
• Picard Variety
• Pick's Formula
• Pick's Theorem
• Picone's Theorem
• Piecewise Circular Curve
• Pie Cutting
• Pigeonhole Principle
• Pi Heptomino
• Pillai's Conjecture
• Pilot Vector