Question

Va rog mult ajutatima +ofer coroana!!!!Aflati masura unghiului B al triunghiului ABC, daca :
a) m(∠A)=m(∠C)=50°
b) m (∠A)= \frac{1}{2} m (∠B) =m(∠C)
c)m(∠A)=2m(∠B)=m(∠C)
d)m(∠A)+m(∠C)=m(∠B)

Answer 1

a. A+B+C=180°, A+C=100°⇒B=180-100=80°

b.A=1/2B=C
2A=B=2C
A+B+C=180°
180/5=36°
2A=2*36=72°⇒A=36°
B=72°
2C=2*36=72°⇒C=36°

c.A=2B=C
A+B+C=180°
180/4=45°
A=C=90°
B=45°

d.A+C=B
A=C=45°
B=90°