In ΔABC, the external bisectors of the angles ∠B and ∠C meet at the point O. If ∠A = 70°, then the measure of ∠BOC is :

Answer: Option C

As we know
⇒ The external bisectors of the angle ∠B and ∠C meet at the point O
∠BOC = 90° - $$\frac{\angle A}{2}$$
∠BOC = 90° - $$\frac{70}{2}$$
∠BOC = 90° - 35°
∠BOC = 55°