Question

One of the angle of a triangle is ${100}^o$ and the other two angles are equal. find the each of the angle?

Answer 1

given one of the angle of a triangle and other two sides are equal

let the other angle be $x^o$

By triangle sum property we have

$⟹{100}^o+x^o+x^o={180}^o$

$⟹{100}^o+2x^o={180}^o$

$⟹x^o={40}^o$