Question

In triangle ABC angle A -angle B=15°, angle B-angle C=15°.find angle B​

Answer 1

angle A minus angle b is equal to 15 degree

angleA is equal to 15 degree + angle b

angle angle b minus angle c is equal to 15 degree

angle c equal to angle b minus 15 degree

according to angle sum property of triangle

angle A + angle b + angle c equal to 360 degree

putting the value of angle A and angle c

15 degree + angle b + angle b + angle b minus 15 degree equal to 360 degree

three angleA is equal to 360 degree

angle A equal to 360 degree upon 3

angleA equal to 120 degree