Question

Angle ABC is an isosceles triangle with AB=AC. If angle B=40 what are the measure of angle Aand angle C?

Answer 1

Answer:

Angle A = 100°

Angle C = 40°

Step-by-step explanation:

In ∆ABC,

AB = BC

Angle B = 40°

We know that when opposite sides are equal their angle will also be equal

So,

Angle B = Angle C

Angle C = 40°

Now in ∆ABC,

Angle A + Angle B + Angle C = 180°

Angle A = 180° - 40° - 40°

Angle A = 100°