Question

In triangle ABC,BC=AB and angle b=80 degree then find angle a

Answer 1

Answer:

A=50

Step-by-step explanation:

AB=BC

it means triangle is Isosceles triangle because its two sides are equal

Hence,

let angle A & angle C be x

as you know the sum of all angles in triangle is 180.

2x+80=180

2x=100

x=50

angle A=x which is equal to 50