Brianchon's Theorem
Contents
Theorem
Let tangents to $6$ points on a conic section $K$ form a hexagon $H$ to circumscribe the $K$.
Then the main diagonals of $H$ meet at a single point.
Proof
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Source of Name
This entry was named for Charles Julien Brianchon.
Sources
- 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $6$
