Olympiad Geometry Problem #14: Outer Butterfly Theorem

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This is a very beautiful theorem which is not as famous as the other "Inner" Butterfly Theorem I have already shown on my channel. I will give two proofs. Enjoy!

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May you livestream a bit later please! in my country, it's so soon that I am unable to enjoy your livestream huhu

_datnguyenduong
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Sir plz give pdf of important confrigation

AmanKumar-loiz
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I thought of projective geometry but not applied
Such a fool

AmanKumar-loiz