The perimeter of a triangle is the sum of all its side lengths
11.3 + 14.7 + x < 44
Combine like terms
26 + x < 44
Subtract 26 from both sides.
x < 18
C and E that is the answer
We know that the ratio is;

The angles in a triangle add up to give 180°
We can think of there being twelve "parts" that add up to 180°

So our ratio is;

So the smallest angle is 30°