Question

ajuatima la ex 11 pun coroana va rog

Answer 1

11
A+B+C=180°
a)m(∡A)=m(∡C)=50
m(∡B)=180°-50°-50°=80°


b)m(∡A)=2m(∡B)=m(∡C)
2m(∡B)+m(∡B)+2m(∡B)=180°
m(∡B)=180°:5=36°


c)
m(∡A)=m(∡B)/2=m(∡C)
m(∡B)/2+m(∡B)+m(∡B)/2=180°
4m(∡B)=360°
m(∡B)=360°:4=90°


d)
m(∡A)+m(∡C)=m(∡B)
m(∡B)+m(∡B)=180°
2m(∡B)=360°
m(∡B)=180°:2=90°

Answer 2

ai rezolvarea în imagine