Difference between revisions of "2007 JBMO Problems/Problem 2"
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Revision as of 10:28, 10 January 2024
Let I be the intersection between and the angle bisector of So So We can conclude that are on a same circle. So Because and we have So So is on the angle bisector of and on the mediator of . The first posibility is that i steh south pole of so is on the circle of but we can easily seen that not possible The second possibility is that is isosceles in . So because and is isosceles in we have . So