Respuesta :
The size of the third angle is 65°.
All interior angles in a triangle must equal to 180°.
So, if 1st and 2nd angle is 115°, then, the 3rd angle would be equal to the difference of 180° and 115°.
3rd angle = 180° - 115° = 65°
All interior angles in a triangle must equal to 180°.
So, if 1st and 2nd angle is 115°, then, the 3rd angle would be equal to the difference of 180° and 115°.
3rd angle = 180° - 115° = 65°