Županijsko natjecanje 1997 SŠ3 2
Dodao/la:
arhiva1. travnja 2012. U trokutu

povučene su simetrale

i

kutova

i

(

i

su točke na stranicama

i

). Nađite kut

ako je

i
%V0
U trokutu $ABC$ povučene su simetrale $AD$ i $BE$ kutova $\angle CAB$ i $\angle ABC$ ($D$ i $E$ su točke na stranicama $\overline{BC}$ i $\overline{AC}$). Nađite kut $\gamma = \;\angle BCA$ ako je $|AD|\cdot |BC| = |BE|\cdot |AC|\;$ i $\;|AC|\ne |BC|.$
Izvor: Županijsko natjecanje iz matematike 1997