Q3 of 34 Page 170

In a triangle ABC, ∠B = 70°. Find ∠A + ∠C.

In the given ∆ABC,


∠B = 70°


We know that the sum of all the angles of a triangle is 180°.


⇒ ∠A + ∠B + ∠C = 180°


⇒ ∠B + ∠C = 180° - 70°


⇒ ∠B + ∠C = 110°


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