Răspunsuri

2014-08-29T16:24:35+03:00
  • Utilizator Brainly
2014-08-29T16:28:03+03:00
X+y=180°
x=90° ,  y=?
x=90°+40°
x=130°
130°+y=180°
y=180°-130°
y=50°
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