Question

34. In ∆ ABC, if BC = AB and angle B = 80°, then angle A
is equal to
(b) 50°
(c) 60°
(d) 70°


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Answer 1

Answer:

(b)50

Step-by-step explanation:

AB=BC SO base angles are equal

angle bac= angle bca

Using angle sum property

bac + abc + bca = 180

consider bac and bca as x

so, abc+2x=180

abc=80 given

2x=180-80

x=50

Answer 2

Your correct option is b, I mean your answer is 50°

I hope it helps you.