In ΔABC, ∠A = 40°. If \(\overrightarrow{\mathbf{B O}}\) and \(\overrightarrow{\mathbf{C O}}\) are the bisectors of ZB and ZC, then the value of ∠BOC is
A. 110°
B. 70°
C. 40°
D. 140°
Answer:A
In ΔABC, ∠A = 40°. If \(\overrightarrow{\mathbf{B O}}\) and \(\overrightarrow{\mathbf{C O}}\) are the bisectors of ZB and ZC, then the value of ∠BOC is
A. 110° B. 70° C. 40° D. 140°