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Question
In ΔABC, ∠A = 76°, ∠B = 48°, ∴ C = ______.
Options
66°
56°
124°
28°
Solution
In ΔABC, ∠A = 76°, ∠B = 48°, ∴ C = 56°.
Explanation:
In ∆ABC,
∠A + ∠B + ∠C = 180∘ ...(Angle sum property of triangle)
⇒ 76∘ + 48∘ + ∠C = 180∘
⇒ 124∘ + ∠C = 180∘
⇒ ∠C = 180∘ − 124∘
⇒ ∠C = 56∘
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