Question

Last one of these, but i have some other ones i dont understand if you will help

Answer 1

The answer is 75

Answer 2

C + 45° is the Exterior Angle of the Triangle

The Interior Angle with respect to C + 45° is 180° - C - 45° = 135° - C

We know that Sum of Angles in Triangle = 180°

⇒ C - 30° + C + 135° - C = 180°

⇒ C + 105° = 180°

⇒ C = 180° - 105°

⇒ C = 75°