In Δ ABC, ∠A = 85° ,∠B = 56° , ∠C= ? *
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Ans is 39
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sum of angles of triangle = 180°
angle A+B+C = 180°
85°+56°+c =180°
141°+c=180°
c= 180° - 141°
c= 39°
hence angle c is 39°
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