Difference between revisions of "2013 Canadian MO Problems/Problem 5"
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Latest revision as of 01:19, 27 November 2023
Problem
Let 
denote the circumcentre of an acute-angled triangle 
. Let point 
on side 
be such that 
, and let point 
on side 
be such that 
. Prove that the reflection of 
in the line 
is tangent to the circumcircle of triangle 
.
Solution
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