Question

In Angle ABC, BC = AB and 2B = 80°.
Then angle A is equal to​

Answer 1

Answer:

Angle A is equal to 70°

Step-by-step explanation:

If 2B=80°

then,

B=80°/2=40°

so,

Angle A+Angle C=180°-40°=140°

since, AB=BC

then, Angle A=Angle C

so,

A+C=140°

or,A+A=140°[since A=C]

or,2A=140°

or,A=140°/2=70°

so, Angle A=70°