Question

If in ∆ ABC, angle A +Angle B=150° and angle B + angle C =120° then find B

Answer 1

Answer:

angle A+B= 150°

B+C=120°

TRIANGLE ABC = A+B+C=180

Let's take angle B =x

A+x=150°

x+c=120° both sub.

A+C=30°

this triangle is right angle now

angle A = 60

B= 90

C=30