In in a triangle ABC, AB = AC. BC is extended to D. and ACD = 120°, then A is equal to
BC is extended to D. Hence, Angle on line BC = 180 degrees.
We have been given that, Angle ACD = 120 degrees.
=> Angle ACB = 60 degrees. Angle ABC = Angle ACB - since the given triangle is isosceles.
Angle A + Angle B + Angle C = 180 degrees (Angles in a triangle)
=> Angle B = 180 -60 -60
Angle B = 60 degrees.
Option B is the right answer.
Create a FREE account and get:
Detailed syllabus & Topic-wise Weightage
By proceeding you agree to create your account
Free CAT Syllabus PDF will be sent to your email address soon !!!
