Question

in angle abc angle c equal to 3 Angle B equal to 2 (angle A + Angle B) then the value of Angle B will be

Answer 1

Angle C=3 angle B=2angle A+2angle B

3angle B=2angle A+2angle B

angle B=2angle A

Angle A= 1/2angleB

Angle A+angle B+angle C=180

1/2angleB + angleB +3angle B=180

1/2angleB+4angleB=180

1angleB+8angleB/2=180

9angleB=360

AngleB=360/4

AngleB=90