Question

In triangle ABC AB=AC. If angleB =30 degree what is the measure of angle A

Answer 1

Answer:

A + B + C = 180°

( Angle Sum property of a ∆ )

B = C = 30°

( ∆ ABC is an isosceles ∆ )

A + 30° + 30° = 180°

A + 60° = 180°

A = 120°

Answer 2

Ya 120 degrees is the correct answer