Question

triangle ABC is an isosceles triangle with AB = AC. If angle B = 40º, what are the measures of angle A and angle C?​

Answer 1

Answer:

Angle A = 100°

Angle C = 40°

Step-by-step explanation:

Given that AB = AC

Therefore, Angle B = Angle C

=> Angle B = 40° = Angle C

Now,

We know that Sum of all interior angles of a triangle is equal to 180°

=> Angle A + Angle B + Angle C = 180°

=> Angle A + 40° + 40° = 180°

=> Angle A + 80° = 180°

=> Angle A = 180° - 80°

=> Angle A = 100°

Answer 2

Step-by-step explanation:

sorry for cuts angle b is 100 degrees

a is 40 degrees