Question

4.Aflati masura unghiurilor triunghiului ABC,daca:
b.∠A≡∠B, ΔABC≈ΔMNK si m(∠K)=40°
c.∠A≡∠B, ΔABC≈ΔDEF si ∠D≡∠F

Answer 1

b. daca ABC=MNK=>m(‹C)=m(‹K)=40°
m(‹A)=m(‹B)=x
40°+2x=180°
2x=180-40
2x=140
x=70°
R-s: m(‹A)=70°
m(B)=70°
m(C)=40°