Question

In ∆ABC , if AB = AC and ∠B=80° then ∠C is equal to

a) 20° b) 40° c) 60°

Answer 1

Here,

given, angle B = 80 degree

in ABC triangle, AB = AC

that means angle B = angle C

so angle C must be 80 degree

Explanation:

I guess, the options are wrong

or,

may the question asked for angle angle A

which will be = 180- (80+80) = 180 - 160 = 20 degree (option a)