Answer:
∠ C < ∠ B < ∠ A.
Explanation:
The length of the sides of a triangle are proportional to the measurement of its opposite side and vice-versa.
Now, in a triangle Δ ABC the opposite angle of side AB is ∠ C, the opposite angle of the side BC is ∠ A and the opposite angle of the side CA is ∠ B.
So, if it is given that AB < AC < BC, then we can say that ∠ C < ∠ B < ∠ A. (Answer)