Question

the Vertical angle of an isosceles triangle is 100 degree find its base angle​

Answer 1

ok lemme try

Let ΔABC be an isosceles triangle with vertical angle ∠A=100  ∘

 and AB=AC.

Then,

AB=AC⇒∠B=∠C

But, ∠A+∠B+∠C=180  ∘

 

∴100  ∘

+2∠B=180  ∘

⇒∠B=40  ∘