Question

In triangle ABC , BC= AB and <B= 80° , then <A is equal to​

Answer 1

Answer:

in abc

given_ ab=bc and since two sides of a triangle are equal it is an isosceles triangle so

angle b =angle c =80

now

a+b+c=180

a+80+80=180

a+160=180

a=180-160

a=20