Question

In triangle ABC ,AB = AC. id angle b = a-60 and angle c = 120-2a. find a​

Answer 1

Answer:

Step-by-step explanation:

we know that two angels of isosceles triangle are same. so angle b=c

in triangle ABC angels

a+b+c=180

60+c+c=180

2c=120

c=60

b=c=60