Question

 In ∆ABC, BC = AB and ∠B = 80°. Then ∠A is equal to: *



a. 50

b. 100

c. 80

​

Answer 1

Answer:

50

Step-by-step explanation:

AB =BC (given )

angle b =80°

angle A = angle C (isosceles triangle)

let angle a and c be x

x + x + 80 =180°

2x=180

x=100/2

x=50 answer