Question

Dacă triunghi ABC congruent triunghi PMN, KBAC = 80°, KABC = 40°, atunci KPNM=​

Answer 1

Răspuns:

m(∡PNM)=60°

Explicație pas cu pas:

Δ ABC ≡ Δ PMN =>

m(∡ABC)=m(∡PMN)

m(∡BAC)=m(∡MPN)

m(∡ACB)=m(∡PNM)

m(∡ABC)=40° =>m( ∡PMN) =40°

m (∡BAC) = 80° =>m( ∡MPN ) = 80°

m(∡ACB) = 180°- (80°+40°) = 180°-120°=60° => m(∡ACB) = 60° => m(∡PNM)=60°