Question

a) m (unghi A) = 50 la suta

Answer 1

m(<A)=m(<C)=50 grade
m(<B)=m(<D)=X grade
suma masurilor unghiurilor unui paralelogram este 360
m(<B)+m(<D)+m(<A)+m(<C)=360
x+x+50+50=360
2x+100=360
2x=360-100
2x=260
x=130
m(<B)=m(<D)=130 grade