Question

If each one of the equal angles of an isosceles triangle is 55 deegre
find the third angle.​

Answer 1

Answer:

Given two equal angle of isoscles triangle 

are 55∘

let third angle be x then

x+55+55=180∘ [angle sum property]

x=180−110∘

(x=70∘)

∴ the other angle is 70∘

Answer 2

Answer:

Triangle : sum of all angles is 180°

2 angles =55°+55°

180-110= 70° so the other angle is 70°

Verification:

180=55+55+70