Question

an exterior angle of a triangle is 115 and one of the interior opposite angle is 35 find other two angles of a triangle

Answer 1

Let the interior opposite triangle which is unknown to us be 'x', and third angle of the triangle adjacent to the exterior angle of the triangle be 'y'.

Since, an exterior angle of a triangle is equals to the sum of the interior opposite angles of the triangle, therefore
x+35° = 115°
x = 80°

Also sum off al the angles of the triangle results into 180°, Hence

35° + x + y = 180°

35° + 80° + y = 180°

y = 65°

Hope I've helped you!