Question

Ajutor!!!Vă rog!!!Este urgent!Dau coroană!Doar a)!​

Answer 1

Răspuns:

∡A=120°

∡B=140°

∡C=100°

Explicație pas cu pas:

AB=∡C

BC=∡A

CA=∡B

∡A+∡B+∡C=360°

$\frac{AB}{5} = \frac{BC}{6} = \frac{CA}{7} = K$

AB=5K

BC=6K

CA=7K

5K+6K+7K=360

18K=360 => K=360/18 => K=20

AB=5*20=100° => ∡C=100°

BC=6*20=120° => ∡A=120°

CA=7*20=140° => ∡B=140°