Q1 of 153 Page 144

In , if ==76°and =48°, find .

=56°


In ΔABC,


∠A + ∠B + ∠C = 180° [Sum of angles]


⇒ ∠A + 76° + 48° = 180°


⇒ ∠A + 124° = 180°


⇒ ∠A = 56°


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