Question

find the verticle angle of an isosceles triangle is 80°. find the base angle??

Answer 1

We know that an isosceles triangle has two sides of the same length and one side of different length.

The sum of the measures of the angles of the triangle is 180°.

We know the vertical angle of the triangle i.e., 80°.

Let the base angles be x and x since they have the same value.

So we get,
x+x+80=180° (by condition)
2x+80=180°
2x= 180-80
2x=100
x=100/2
x=50°

So the measure of both the base angles are x i.e., 50°.