Solution
The sum of three angles of a triangle is always = $$180^\circ$$
(A) : 33°+ 42°+ 115° = 190°
(B) : 40°+ 70°+ 80° = 190°
(C) : 30°+ 60°+ 100° = 190°
(D) : 50°+ 60°+ 70° = 180°
=> Ans - (D)
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