Question

varog frumos daucorana de aur

Answer 1

m(A)=m(C)=50° de aici ⇒ m(B)=m(D)=x°
stiind ca suma masurilor unui paralelogram = 360°
⇒m(B)+m(D)+m(A)+m(C)=360° calculezi sub forma de ecuatie in care x este o necunoscuta unde:
x+x+50°+50°=360°
2x+100°=360°
2x=360°-100°
x=130°⇒m(B)=m(D)=130°