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# An Excenter and Circle

Given a triangle $$ABC$$, denote $$I$$ as the incenter and $$I_a$$ as the A-excenter. Denote $$F$$ as the foot of the perpendicular from $$I$$ to $$BC$$. Prove that line $$I_aF$$ bisects the A-altitude.

Note by Alan Yan
1 year, 10 months ago

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