Question

The measure of the vertex angle of an isosceles triangle is 100 degrees. What is the number of degrees in one of the base angles of the triangle?

Answer 1

`40^o`

Explanation:

The base angles of an isosceles triangle are equal.

let one base angle `" "=x`

`x+x+100=180`

`2x=180-100=80`

`:.x=80/2=40`