Answer:
∠1=70
∠2=110
∠3=30
Explanation:
Triangle angles added up = 180 degrees. So, ∠1= 180-30-80=70
Straight lines are 180 degrees as well. So ∠2=180-∠1=180-70=110
Solve for ∠3 in the same way as ∠1. ∠3=180-40-∠2=180-40-110=30
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