Answer:
45°
Step-by-step explanation:
in a triangle,
we know that sum of all interior angles are equal to 180°.
so,
(3x+14)° + (5x-2)° + (10x-18)° = 180°
therefore, 18x - 6 = 180°
so, x = 186/18 = 93/9
Now,
angle CDF = (3x + 14)° = (3*93/9 + 14)° = (31+14)° = 45°
