If in a triangle ABC as drawn in the figure, AB = AC and ∠ACD = 120°, then ∠A is equal to:
If in a triangle ABC as drawn in the figure, AB = AC and ∠ACD = 120°, then ∠A is equal to:
[A]70°
[B]60°
[C]50°
[D]80°
60°
∠ACB = 180° – 120° = 60°
AB = AC
∴ ∠ABC = ∠ACB = 60°
∴ ∠BAC = 60°
Hence option [B] is the right answer.