Răspuns:
a) m(A) +m(B)=180° m(A)= 5*m(B)
5m(B)+m(B)=180 6m(B)=180 m(B)=30°
m(A)=180-30= 150 °
b) m(A) +m(B)= 90° m(A)=m(B):3 => m(B)= 3*m(A)
m(A)+3m(A)=90 4m(A)=90 m(A)=90:4=22°30'
m(B)= 67°30'
c) m(A)+m(B)=90 m(A)=m(B)+40
m(B)+40+m(B)=90 2m(B)=90-40= 50
m(B)=50:2 =25° m(A)=40+25=65°
d)m(A)+m(B)=90 m(A)=m(B)-26
m(B)-26+m(B)=90 2m(B)=90+26= 116
m(B)=116:2= 58° m(A)= 58-26=32°
