question_answer

In the given figure, \[BO\] and \[CO\] are angle bisectors of external angles of\[\Delta ABC\]. Find\[\angle BOC\].

A) \[{{90}^{o}}-\frac{1}{2}\angle A\]                   

B) \[{{90}^{o}}+\frac{1}{2}\angle A\]

C) \[{{180}^{o}}-\frac{1}{2}\angle A\]     

D)        \[{{180}^{o}}+\frac{1}{2}\angle A\]