Question

In Δ ABC isoscel ,[AB}≡[AC] , se duce bisectoarea BE a ∡ABC ,E∈ [AC] .Daca m ∡(AEB)=75°, sa se afle unghiurile Δ ABC.

Answer 1

masBEC=180-75=105
in triunghi BEC suma ungh este 180 adica
masEBC+masECB=180-105=75
dar masECB=2*masEBC=>3*masEBC=75 si masEBC=25
deci masABC=mas ACB=50