Question

6. In ABC, if BC = AB and ZB = 80°, then LA is equal to :
(c) 25°
(a) 80°
(6) 40°
(c) 50°
(d) 100​

Answer 1

Answer:

c) 50°

Step-by-step explanation:

angle A + B + C = 180°

angle B = 80°

corresponding angles of equal side of isosceles triangle are equal

angle A = angle B

A + B + A = 180°

2A + 80 = 180

2A = 180 - 80

2A = 100

A = 100/2

A = 50°

hence proved

hope you get your answer