Question

in an isosceles triangle AB=AC angle A=80° find angle B and angle C

Answer 1

Angle B =50°
Angle C =50°

Answer 2

Given :- AB = AC and <A = 80°

Solution : -

Since AB = AC,

<B = <C ( angles opposite to equal sides of a triangle are equal)

Let <B = <C = a

Now,

By angle sum property of triangle,

a + a + 80 = 180

=> 2a = 100

=> a = 50


<B = 50°

<C = 50°