Question

An exterior angle of a triangle is 125∘ and one of its interior angle is 65∘. Find the other two angles of the triangle.

Answer 1

heya mate here is your answer

Given that one of the exterior angle is 125* and one of the interior angle is 65* then let other be y
then according to exterior property we can write it as 65 + y = 125

y = 125 - 65

y = 60

now another angle is 180 - (65 + 60 )

according to triangle property

=>180 - 125

=> 55*

so now all the angles are 55 , 65 , 60

i hope it helped uh !!

thank uh !!

Answer 2

let one of the unknown angle be x
then,
x+65=125(sum of two interior angle equals to one opposite exterior angle)
x=125-65
=60
again,
let the angle of triangle which is unknown be y
then,
60+65+y=180
y=180-125= 65