Question

In triunghiul ABC,AB=AC si m (B) =70
a)calculati masurile celorlalte doua unghiuri
b)daca CD perpendicular cu BC,A apartine BD,calculati m(BDC) si comparati AD cu AC

Answer 1

a)Tr.ABC,este,isoscel(AB=AC)=>m(C)=70⁰=>m(A)=180⁰-140⁰=>m(A)=40⁰
b)Daca,CD_l_BC=>m(ADC)=m(CDB)=90⁰
AD<AC