Question

In triangle ABC, LA = 70° and AB = AC, then 2B =
​

Answer 1

Answer:

Since, AB = AC, therefore, ∠B=∠C

By angle sum property of triangle,

∠A+∠B+∠C=180

o

70

o

+2∠B=180

o

2∠B=110

o

∠B=55

o

Hence, ∠B=∠C=55

o