Question

an exterior angles of a triangle is 105° and it's two interior opposite angles are equal. find the angles.

Answer 1

sum of interior opposite angles of a triangle= the exterior angle of a triangle ( a law)
let the interior opposite angles be x and y,
x+y= 105°
but since x=y,
x+x= 105°
2x= 105°
x= (105/2) = 52.5°