Sum of angles of a quadrilateral is 360°

Let angle is x°

Therefore each angle is 3x, 5x, 7x and 9x

3x° + 5x° + 7x° + 9x° = 360°

24x° =

x° =

x° =

Therefore angles are: 3x = 3 × 15 = 45°

5x = 5 × 15 = 75°

7x = 7 × 15 = 105°

9x = 3× 15 = 45°