Question

In triangle abc,ab=bc and angle b=40°.then angle c=

Answer 1

Since AB = BC, So Angle A = Angle C.
b=40°
By A.S.P.
a + c = 140°
c + c = 140°
c = 70°

Answer 2

hi

given , ab =  bc

so the opposite angels should also be equal the,

angle(a) = angle (c) = x

angle(b) = 40

sum of angles in triangle is 180

angle(a) + angle(b) + angle(c) = 180

x + 40 + x =180

2x = 140

x = 70

angle(c) = 70