IMO Shortlist 1992 problem 11


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2. travnja 2012.
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In a triangle ABC, let D and E be the intersections of the bisectors of \angle ABC and \angle ACB with the sides AC,AB, respectively. Determine the angles \angle A,\angle B, \angle C if \angle BDE = 24 ^{\circ}, \angle CED = 18 ^{\circ}.
Izvor: Međunarodna matematička olimpijada, shortlist 1992