Question

please.. its urgent. answer the question quickly.

Answer 1

Given Angle A = 70 degrees.    ----- (1)

We know that Sum of measure of angles in a triangle = 180.

    Angle  A + Angle B + Angle C = 180   ------- (2)

Substitute (1) in (2), we get

70 + Angle B + Angle C = 180

Angle B + Angle C = 180 - 70

Angle B + Angle C = 110

If angles B and C measure 180. Then their bisector would measure half of them.

Angle B + Angle C/(2) = 110/2

Angle B/2 + Angle C/2 = 55

Therefore Angle OBC + OCB = 55

Thus Angle BOC = 180 - (Angle OBC and angle OCB)

                             = 180 - 55

                             = 125.


Therefore Angle BOC = 125 degrees.


Hope this helps!