Question

If in a triangle ABC, angle A+B=105, angle B+ C = 120 then B is​

Answer 1

Answer:

45

Step-by-step explanation:

Angle A + Angle B = 105

Angle B + Angle C = 120

or Angle C = 120 – Angle B

Now, Angle A + Angle B + Angle C = 180 ...Angle Sum property of a triangle

or

105 + 120 - Angle B = 180

or 225 - Angle B = 180

or Angle B = 225 – 180 = 45