Question

12 va rog dau coroana

Answer 1

m(∡B)=m(∡C)=(180°-120°)/2=30°
ducem AD _I_ BC
BD=DC=6√3/2=3√3
cos 30°=BD/AB
√3/2=3√3/AB
1/2=3/AB
AB=2×3=6 cm              AB=AC=6 cm
P=6+6+6√3=6(2+√3) cm

teorema unghiului de 30° ⇒ AD=6/2=3 cm
A=6√3×3/2=9√3 cm²

Answer 2

m(∡B)=m(∡C)=(180°-120°)/2=30°
Construim AD _I_ BC
BD=DC=6√3/2=3√3
cos 30°=BD/AB
√3/2=3√3/AB
1/2=3/AB
AB=2×3=6 cm AB=AC=6 cm
P=6+6+6√3=6(2+√3) cm

teorema unghiului de 30° catetei AD=6/2=3 cm
A=6√3×3/2=9√3 cm²
Sper ca team ajutat❤